JP3555878B2 - How to use antifouling paint, tape or sheet - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a paint or a film used for a portion that comes into contact with water or seawater, and more particularly to a paint or a film used on a ship bottom to prevent the attachment of organisms such as shells and seaweeds, and a method of using the same. .
[0002]
[Prior art]
Heretofore, in order to prevent shellfish and seaweed from adhering to the bottom of a ship or a seawater intake for cooling, lead-containing paint has been used to prevent these organisms from adhering.
[0003]
However, the use of lead in paints has been drastically reduced due to the increasing awareness of environmental issues in recent years, and in the current situation where there is no effective ingredient to replace lead, it is common practice to regularly scour shells and seaweed attached to the bottom of ships. It has become.
[0004]
[Problems to be solved by the invention]
Although the above-mentioned kelenium operation does not cause environmental problems due to the use of lead, shellfish and seaweeds are attached in a short period of time, and since the kelenium operation is manually performed, the cost is high, and a new, effective and low-cost method has been required.
[0005]
Therefore, an object of the present invention is to prevent the adhesion of shellfish, seaweeds and seaweeds, and to eliminate the necessity of keren work, thereby making it inexpensive and not harming the environment. It is an object of the present invention to provide a method of using the information.
[0006]
[Means for Solving the Problems]
In order to solve the above problems, the invention of claim 1 is a method of using a biofouling-preventive paint, in which, when the object to be coated is a conductive material, an electrically insulating paint is applied to the object in advance. In addition, an anti-biofouling paint containing a magnetic substance mixed in a conductive paint is applied to the upper layer of the electrically insulating paint, and after the biofouling prevention paint is dried, the magnetic substance is magnetized diamagnetically. It is a method of using a biofouling prevention paint .
[0007]
The invention according to claim 2 is a tape or sheet for covering a portion that comes into contact with water, wherein the tape or sheet is formed by drying a magnetic material mixed in a conductive paint, and A bioadhesion preventing tape or sheet characterized by being diamagnetically magnetized .
[0008]
According to a third aspect of the present invention, in the method using a biofouling prevention tape or sheet, when the object to be coated is a conductive material, an electrically insulating paint is applied to the object in advance, A method for using a biofouling prevention tape or sheet according to claim 2, wherein the biofouling prevention tape or sheet according to claim 2 is attached to an upper layer .
[0013]
The present invention, pigeons that fly to the veranda railing of the apartment house and generate dung pollution, repelling by a magnetic field by a magnet, and slime that grows in the pipe through which water flows, when the outer diameter of the pipe is sandwiched by magnets, Focusing on moving away from magnetic fields, paints used for ship bottoms and cooling seawater intakes are given a magnetic field, and by using magnetic fields to repel creatures, shellfish and seaweeds are prevented from adhering. It is.
[0014]
The paint used in the present invention is a paint having conductivity, and the use thereof is mainly applied to a metal thing such as a hull, but any portion that comes into contact with seawater, fresh water, or the like, A resin material such as a water pipe may be used, and a material having an optimum composition for the composition of the paint body may be selected according to the material of the portion to be applied.
[0015]
The magnetic substance mixed in the conductive paint includes ferrite and the like, and the repelling diamagnetism is more desirable than the positive magnetism which adsorbs a metal without adsorbing foreign substances such as other metals in water.
[0016]
As for the mixing ratio of the magnetic substance, the effect is produced only when the ferrite is mixed at a ratio of, for example, about 7 parts by weight with respect to 100 parts by weight of the coating material, but the magnetic substance is 50 to 70% by weight in the coating material. It turned out to be more effective.
[0017]
Also, the strength of the magnetism is weak enough to have a sufficient effect, and too strong magnetism may have other adverse effects depending on the part to be applied. Therefore, after removing the magnet having a strength of about 600 gauss, A magnetization with a weak residual magnetism is sufficient.
[0018]
In a comparative test, it was confirmed that the product of the present invention also had a rust-preventing effect, although the details of its action were unknown, in addition to the effect of preventing the adhesion of organisms such as shellfish and seaweed.
[0019]
In addition, the biofouling-preventing paint of the present invention can be fixed to a part required by a normal coating operation, or can be fixed by vapor deposition means.
[0020]
In addition, in addition to the paint containing the magnetic substance mixed in the conductive paint, the magnetic substance is also mixed in the conductive paint, and then dried to form a film. Even if the sheet is wrapped in a portion that comes into contact with seawater or the like, the effect of preventing the attachment of organisms is similarly produced.
[0021]
Therefore, even in a site where the application of the paint is difficult in the past, the effect similar to that of applying the anti-biofouling paint can be obtained simply by sticking these biofouling prevention tapes or sheets to the adherend. Occurs.
[0022]
As a method of using the above-mentioned anti-biofouling paint of the present invention, when the internal magnetic substance is magnetized with respect to the paint before application, uneven distribution of the magnetic substance may occur in the paint. After drying, it is preferable to magnetize by means such as applying a magnet.
[0023]
On the other hand, as a method of using the bioadhesion preventing tape or sheet of the present invention, after the tape or sheet is magnetized in advance, it is easier to work by attaching the tape or sheet to the adherend than by magnetizing after attaching. .
[0024]
These biofouling-preventing coatings and biofouling-preventing tapes or sheets may be used as is when the material to be coated or adhered is a non-conductive material. ) Is not electrically insulated, electric discharge occurs to the object to be coated (object to be adhered), and the effect is hindered.
[0025]
Therefore, when used for a conductive material such as iron, an electrically insulating paint is applied to an object to be coated (adhered object) in advance, and a biological adhesion preventing paint is applied to the upper layer of the electrically insulating paint, or It is more effective to attach a bioadhesion prevention tape or sheet.
[0026]
BEST MODE FOR CARRYING OUT THE INVENTION
[Test 1]
First, the following test was performed as shown in FIG. 1 in order to examine the effect when a magnetic substance was mixed in the paint.
[0027]
A test piece A in which the anti-fouling paint of the present invention is applied to one side of an iron plate 1 and a plurality of test pieces B made of an iron plate 1 to which nothing is applied are prepared. It was hung in the sea, left for a few days, and looked up.
[0028]
As shown in FIG. 1, all the test pieces B to which the paint of the present invention was not applied have shells and barnacles 4 adhered thereto and are severely corroded by rust and the like. Barnacles 4 had adhered as an extension of the process.
[0029]
On the other hand, the test piece A to which the paint of the present invention was applied had no shellfish or seaweed adhered to not only one surface to which the paint was applied but also the other surface and the fishing line 2 where no paint was applied, and the test piece A had no corrosion. Was not happening either.
[0030]
From Test 1, it was found that the biofouling-preventing paint of the present invention has a biological repellent effect.
[0031]
[Test 2]
Next, in order to compare the effect of the paint of the present invention with the paint of the conventional product, the following experiment was performed as shown in FIG.
[0032]
The test piece A was coated with the antifouling paint 5 of the present invention on the iron plate 1, and the test piece B was coated with the conventional underwater paint 6 on the iron plate 1 and immersed in seawater for 73 days.
[0033]
As a result, in the test piece A, the blackened part was confirmed, and the biofouling (Cerpla) was not so much as that of the test piece B. On the other hand, the test piece B showed both the corrosion and the biofouling. There were more than A.
[0034]
From the above results, the anti-biofouling paint of the present invention has a greater anti-biofouling effect than conventional underwater paints, but it is not possible to exert a complete effect when the object to be coated is a conductive material such as iron. Do you get it.
[0035]
[Test 3]
Next, a test was conducted to examine the difference in the effect of the anti-biofouling paint of the present invention depending on the conductivity of the object to be coated.
[0036]
The antifouling paint of the present invention was applied to an acrylic plate of a non-conductive material and iron of a conductive material, and a marine suspension test was performed for about 4 months.
[0037]
As shown in FIG. 3, the test piece A was prepared by applying tar vinyl based paints 8 and 9 in a two-layer state in order to give the acrylic plate 7 paint applicability. 5 was applied to form a test piece magnetized after the paint was dried. For test piece B, the anti-biofouling paint 5 of the present invention was applied directly to the iron plate 1.
[0038]
As a result, the test piece A did not discharge in water due to the acrylic resin, the coating film was good, and no biofouling was observed.
[0039]
On the other hand, in the test piece B, corrosion occurred in 40 to 80% of the test piece, and cell plastic (biofouling) was confirmed in that portion.
[0040]
From the above results, from the magnetized painted surface, the effect is small when used for a conductive material such that a weak current generated is discharged, but on the other hand, when used for a non-conductive material, an excellent effect is exhibited. It has been found.
[0041]
According to the results of the above tests 1 to 3, it is considered that the anti-biofouling paint of the present invention is adjusted to an oxidation-reduction potential in water or a potential is generated by a magnetic field action, which leads to prevention of biofouling and corrosion. .
[0042]
However, it has also been found that if the object to be coated is not electrically insulated, a discharge to the object to be coated occurs and the effect is hindered.
[0043]
Therefore, when the object to be coated has conductivity, it is preferable to apply the paint of the present invention after applying the electrically insulating paint without directly applying the paint of the present invention. This is the same for the film-like tape or sheet of the present invention.
[0044]
FIG. 4 shows a method of using the biofouling-preventive paint 5 of the present invention suitable for use as a conductive material such as the iron plate 1. The insulating paint 10 (resin paint) is applied on the iron plate 1. The upper layer is coated with the anti-biofouling paint 5 of the present invention.
[0045]
As shown in FIG. 4, even when the object to be coated (or the object to be adhered) is a conductive material, the same excellent biofouling prevention effect as when used for a non-conductive material can be exhibited. .
[0046]
The mixing ratio of the magnetic substance and the electrically conductive paint in the anti-biofouling paint 5 of the present invention is desirably about 50 to 70% by weight of the magnetic substance as a whole, and the coating is performed twice vertically and horizontally. It is desirable.
[0047]
As described above , according to the method of using the anti-biofouling paint of the present invention , an electric insulating paint is applied to an object to be coated in advance, and a magnetic substance is mixed in the conductive paint in an upper layer of the electric insulating paint. The anti-biofouling paint is applied, and after drying the biofouling-preventive paint, the magnetic substance is magnetized diamagnetically, so when this biofouling anti-fouling paint is applied to the bottom of a ship or a seawater intake for cooling, Repelling diamagnetism prevents the adhesion of other metals, shells, seaweeds, and other organisms in the water, eliminating the need for keren work, lowering maintenance costs and containing no lead, unlike conventional paints. Therefore, there is no risk of adversely affecting the environment.
[0048]
Furthermore, the anti-biological coating of the present invention also has a rust-preventive effect, so that it is no longer necessary to apply the anti-rust coating and the biological repellent paint twice.
[0049]
Also, if the biofouling prevention tape or sheet of the present invention is applied so as to cover the adherend, it exhibits the same effect as the biofouling prevention paint. An effect can be provided, and an effect of preventing biological adhesion immediately after application without applying a coating and drying process can also be obtained.
[Brief description of the drawings]
FIG. 1 is a diagram showing a test situation for examining the effect of the paint of the present invention.
FIG. 2 is a diagram showing a test situation for examining the effect of the paint of the present invention.
FIG. 3 is a diagram showing a test situation for examining the effect of the paint of the present invention.
FIG. 4 is a diagram showing a use state of the paint of the present invention.
[Explanation of symbols]
A, B Test piece 1 Iron plate 2 Fishing line 3 Pier 4 Barnacle 5 Biofouling prevention paint 6 Conventional underwater paint 7 Acrylic plate 8, 9 Tar vinyl paint 10 Insulation paint

Claims (3)

In the method using the anti-biofouling paint, when the object to be coated is a conductive material, the object to be coated is coated with an electrically insulating paint in advance, and a magnetic substance is contained in the upper layer of the electrically insulating paint and in the conductive paint. A method of using a biofouling-preventing paint, comprising applying a biofouling-preventing paint containing lacquer, drying the biofouling-preventing paint, and magnetizing the magnetic substance diamagnetically. A tape or sheet that covers a portion that comes into contact with water, wherein the tape or sheet is formed by drying a magnetic material mixed in a conductive paint, and the magnetic material is magnetized diamagnetically. An anti-biofouling tape or sheet, characterized in that: In the method using a biofouling prevention tape or sheet, when the object to be coated is a conductive material, an electric insulating paint is applied to the object to be coated in advance, and an upper layer of the electric insulating paint is applied according to claim 2. A method for using a biofouling prevention tape or sheet, comprising attaching the biofouling prevention tape or sheet according to the above description.

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