JPH11138093A - Applying method for sealing material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To firmly apply a sealing material to any constructed body, especially, even if its resin-coated surface is hardly bonded like a fluororesin-coated one, by applying the sealing material directly to the constructed body after flame treatment thereof. SOLUTION: When a sealing metal is applied to a constructed surface of a constructed body such as a building for giving watertight and airtight characteristics thereto, the sealing material is applied to the constructed surface of the constructed body directly or through a primer after flame treatment. As for the flame treatment, a method in which methane, ethane, propane, butane, or the like is used as a combustion gas is desirable. As for the sealing material, for example, a silicone series, a modified silicone series, a polysulfide series, a polyurethane series, etc., are used. And as for the primer, a material which can improve an adhesive property between the sealing material and the constructed surface is used, for example, a silane coupling agent, a polyisocyanate, an epoxy resin, etc., are enumerated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for applying a sealing material to a workpiece to improve the adhesiveness of the sealing material to the workpiece when the sealing (sealing) material is applied to the workpiece.

[0002]

2. Description of the Related Art Conventionally, a sealing material has been applied in order to impart watertightness and airtightness to a building or the like. And, as a method of applying a sealing material to a surface to be processed of a body to be processed, conventionally, after cleaning and degreasing the surface to be processed, applying a primer, drying the primer, and further applying a sealing material thereon. The construction method is adopted. In addition, when the surface to be processed is a surface that is difficult to adhere, such as a surface coated with a fluororesin, it is difficult to firmly adhere the sealing material and the primer to the surface to be processed, and it is easy to peel off. After the surface is roughened by sting, a sealing material is applied as described above.

[0003] However, the blasting process is very time-consuming and, depending on the degree of the process, the sealing material does not have a sufficient adhesive force to the surface to be processed, and peels off when a relatively strong force is applied. Problem.

Accordingly, there is a demand for the development of a method of applying a sealing material capable of efficiently bonding a sealing material to a surface to be processed with a high bonding strength even when the surface to be processed is a hardly bonded surface such as a fluororesin coating. Was.

In view of the above, the present inventors have proposed a method of applying a discharge treatment to a surface of an object to be processed first, and then applying a sealing material directly or via a primer (see, for example, Japanese Patent Application Laid-Open No. H11-157,837). No. 8-203085 and No. 8-239924
issue). According to this method, the sealing material can be bonded with high bonding strength even when the surface to be processed is a fluororesin-coated surface. As the discharge treatment, corona discharge treatment is suitably adopted.

However, it is difficult to perform the corona discharge treatment uniformly and effectively when the object to be processed is not a conductor such as a metal or a relatively thin insulator having a thickness of about 1 cm. When the construction body has a configuration in which a metal part and a resin part are combined, there is a problem that it is difficult to treat a resin part close to the metal part.

The present invention has been made in view of the above circumstances, and a sealing material can be applied regardless of an object to be processed. In particular, a resin coating surface is a hardly adherent surface such as a fluorine resin coating surface. However, it is an object of the present invention to provide a sealing material application method capable of firmly applying a sealing material without any trouble.

[0008]

Means for Solving the Problems and Embodiments of the Invention The present inventors have conducted intensive studies to achieve the above object, and as a result, have provided the following sealing material construction method. Claim 1: A method for applying a sealing material, wherein the surface of the object to be processed is subjected to a flame treatment and then the sealing material is directly applied. In a preferred embodiment, the surface of the object to be processed is subjected to a flame treatment, followed by applying a primer and further applying a sealing material. In a preferred embodiment, the object to be processed is a resin-coated building exterior material. Claim 4: The resin coating is a fluorine resin coating.
Construction method of the sealing material described.

Hereinafter, the present invention will be described in detail.
The method for applying a sealing material according to the present invention is capable of applying a sealing material to a known workpiece with good adhesiveness.

[0010] Here, examples of the object to be processed include building exterior materials, and examples thereof include an outer wall panel, a door, a wall material, a window member, and a sash. Also,
There is no limitation on the material of these exterior materials, and even a configuration in which a metal portion and a resin portion are combined or a laminate plate in which a resin film such as a fluororesin film is bonded to the surface of a metal plate, wood, a plastic panel, or the like. Good.

In the present invention, the object to be processed may be coated with a resin, and as the resin coating, a fluorine-based resin coating or the like is suitably used.

The flame treatment of the present invention is performed on the work surface of the work body, and any method generally used may be used, but a method using methane, ethane, propane, butane, or the like as a combustion gas is used. preferable. In addition, the treatment time depends on the material of the work surface, the type and surface condition, the temperature of the combustion flame, etc., but is usually preferably about 0.1 to 10 seconds, and if it is shorter than this, the treatment becomes insufficient and longer. In some cases, the work surface may be damaged, or the treatment may be excessively performed, and the adhesive strength with the sealing material may be insufficient.

Therefore, the flame treatment depends on the shape and number of the blow-out of the combustion flame, but along the place where the combustion flame is treated, the flame treatment is carried out by 0.1%.
It is preferable to adopt a method of gradually moving at about 10 cm / sec to about 10 cm / sec.

In the method for applying a sealing material according to the present invention, as described above, the surface of the object to be processed is subjected to a flame treatment, and the sealing material is applied thereon directly or via a primer. .

Here, as the sealing material, for example,
A silicone-based sealing material, a modified silicone-based sealing material, a polysulfide-based sealing material, a polyurethane-based sealing material, and the like can be given, and these sealing materials can be applied according to a known method. Thereby, in the case of a normal resin having no hard-to-adhere surface, the adhesive strength is further improved compared to the conventional case, and even in the case of a fluororesin or the like having a hard-to-adhere surface, without blasting treatment. In addition, the sealing material can be bonded to the surface to be processed with a higher bonding strength than when blasting is performed.

Further, any primer may be used as long as it improves the adhesiveness between the sealing material and the work surface.
Known ones can be used, for example, synthetic rubbers, acryls, urethanes, epoxies, silanes, etc. which are appropriately blended with a silane coupling agent, polyisocyanate, epoxy resin, synthetic rubber, acrylic resin and the like. Primers. In the present invention, by performing the above-described flame treatment, the adhesiveness between the work surface and the primer can also be improved, so that the work body and the sealing material can be further firmly bonded. .

The primer can be applied to the treated surface to be applied by brush coating or the like, and then applied by a known method such as air-drying.

[0018]

EXAMPLES The present invention will be described below in detail with reference to Examples and Comparative Examples, but the present invention is not limited to the following Examples.

[Examples and Comparative Examples] A 50 mm x 50 mm sample panel (Kyner high-temperature baked panel) coated with a fluororesin on its surface was subjected to the following surface treatment (A) or (B). A sealing material was applied according to the following method (a) or (a). Surface Treatment Method (A) Untreated (Comparative Example) (B) A burner flame using butane gas was sprayed from a distance of 5 cm for 2 seconds. Sealing material application method (A) Primer (Petam No. 3 primer, Bridgestone Co., Ltd.) is applied to the surface to be processed of the panel with a brush, and after air-drying, sealing material (Bridgestone Co., Ltd., polysulfide-based sealing material) , Petam PS2000)
Was constructed. (A) A sealing material (a one-component modified silicone-based sealing material, Petam MS1000, manufactured by Bridgestone Corp.) was directly applied to the work surface of the panel without applying a primer.

Next, an H-type test sample (sample) in accordance with JIS A5758 was prepared using the sample panel subjected to the above treatment, cured at 20 ° C. and 55% RH for 1 week, and further cured at 50 ° C. for 1 week. After curing for a week, the adhesion between the sealing material and the sample panel was examined in accordance with JIS A5758, and the peeled portion was visually examined. Table 1 shows the results
Shown in

[0021]

[Table 1]

From the results shown in Table 1, it was confirmed that the sealing material applied by the application method of the present invention adhered firmly to the work surface, and no peeling was performed at the interface between the seal material and the work surface. Was done.

On the other hand, when the flame treatment was not performed on the work surface of the comparative example, the adhesive strength of the sealing material to the work surface was weak, and interface peeling was inevitable even through the primer.

[0024]

According to the method for applying a sealing material of the present invention, the sealing material can be applied to the work surface of the work object with a strong adhesiveness and with high work efficiency regardless of the material of the work object. .

Claims (4)

[Claims] 1. A method for applying a sealing material, comprising applying a flame treatment to a surface of the object to be processed and then directly applying the sealing material. 2. A method for applying a sealing material, comprising applying a flame treatment to a surface to be processed of a body to be processed, applying a primer, and further applying a sealing material. 3. The method according to claim 1, wherein the object to be processed is a resin-coated building exterior material. 4. The method according to claim 3, wherein the resin coating is a fluorine-based resin coating.