JPH01221470A - Coating material to prevent adhesion of marine organism and product coated therewith - Google Patents

Abstract

PURPOSE:To obtain the title coating material which can be conveniently applied to any object to give a coating film having an improved effect of preventing adhesion of a marine organism, by incorporating a powder of metals, such as copper and/or tin, into a reaction-curing inorganic base material. CONSTITUTION:A reaction-curing inorganic base material comprising a composition capable of curing through reaction after application and preferably consisting mainly of an alkyl silicate is mixed with a powder of metals, such as copper and/or tin, of a particle diameter of 5-50mum and, if necessary, a flexibilizer, MnO2, carbon black, etc.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is applicable to marine structures, seawater transport pipes, ships, fishing nets, etc.
Paint on the water-contact surfaces of systems used in contact with seawater.

The present invention relates to a paint that prevents 111 deposits on marine organisms, and products coated with the paint.

[Conventional technology]

Systems that are used in contact with irrigation include fujitsuho and mussel.

When installing these systems, take measures to prevent marine organisms from adhering to them, as they can cause various problems such as increased wave receiving power, blockage of @ channels, and damage to anti-corrosion coatings. How to do so is an extremely important issue. The main methods that have been used in the past include: (1) painting with a paint containing an organic tin preparation, (2) injection of a chlorine-based substance, (2) painting with a low surface energy paint, and (2) coating with a copper-based metal.

Among these, ■ and ■ are extremely effective.

Due to environmental pollution issues, there has been a trend towards refraining from hiring them in recent years. ■ is a physical method and there is no environmental pollution, but
The targets are limited because it requires advanced painting techniques and the duration of the two effects is short.

Regarding the remaining (2), if the ion is highly concentrated, it will be toxic, but the ion is purely inorganic, like the ions in natural seawater, and will not affect the content in each water. Its use is increasing as it is believed that its elution does not actually cause any environmental problems.

Conventional methods for coating with copper-based metal include a method of pasting a general plate of copper-based metal and a method of forming a copper-based metal layer by plating or the like.

[Problem to be solved by the invention]

However, all of these conventional copper-based metal coating methods have problems such as limitations on the objects to be coated, and the need for a large amount of copper-based metal consumption, resulting in high costs.

Therefore, 1. By creating a paint containing copper powder in a paint based on a normal organic polymer, and applying this paint to the object using a painting technique, a coating layer containing copper powder is formed. It is proposed that. However.

In the organic polymer base coating formed by this paint.

Even if copper powder is contained therein, the elution of ions is extremely unlikely to occur, and for this reason, such paints have not been very effective. In order to improve this point, a method has been developed in which the same powder is contained in ion-permeable glass and 5 is fused to the surface of the metal substrate, but this method requires high-temperature firing. 5. A surface coated with an organic polymer anti-corrosion coating that is indispensable for marine structures.

Alternatively, it cannot be applied to systems such as fishing nets that are themselves made of organic polymer materials, which limits the range of applications and also has the drawback of being difficult to apply.

The present invention has been made in order to overcome the application constraints or performance limitations of the above-mentioned prior art, such as the 1 duplex system.

An object of the present invention is to provide a marine life adhesion prevention paint that can be easily applied to any object using ordinary painting techniques and that can form a coating with a large marine life adhesion prevention effect, and a product coated with the paint. shall be.

[Failure to solve the problem]

1) The present invention is based on 2) a reaction-curing inorganic base [4).

The main subject matter is a paint that prevents the adhesion of marine organisms, which is characterized by containing powder and granules of copper-based metal and/or tin-based metal, and a product in which the above paint is applied to an object whose two surfaces are made of an organic polymeric material. It is something.

The reactively curable inorganic base used in the present invention may be any composition as long as it can be reactively cured after coating to form an inorganic film. alkyl cita fu-1・
Typical examples are those with an alkali silicate I, such as Hydraulic Glass, etc., and alumina vine, silica vine, etc. are also often used. Since the main purpose of the present invention is to be applied to organic polymer materials, the present invention is a liquid composition that can be cured to form an inorganic film at a temperature within a temperature range that does not cause thermal decomposition of organic polymer materials. At present, alkyl silicates, typified by ethyl silicate, are most suitable from various points such as duality, workability, and durability of the produced film.

Additives for improving properties may be mixed with these inorganic bases, if necessary. For example, since the inorganic film produced from the above-mentioned base material does not inherently have excellent flexibility, it is preferable to add a small amount of butyral resin or the like as a flexibility improver.

The reactively curable inorganic base may be used alone as long as it can be coated by a suitable coating technique, but usually.

Viscosity adjustment 1 Reaction adjustment 1 To improve dispersibility, etc., dilute with an appropriate solvent and use -ζ. The solvent to be used may be one that is used in ordinary inorganic-based paints, such as alcohols, ketones, and esters. The mixing ratio of the solvent and the reactively curable inorganic base may be selected so as to obtain the necessary physical properties as a coating material.

Next, regarding the metal powder to be added to the above-mentioned inorganic base, the suitability of copper-based and tin-based may vary depending on the sea area or conditions in which it is used, and it may be necessary to use both in combination.

In many cases, only copper-based metals are required, and pure copper powder exhibits excellent performance. The shape and dimensions of the metal powder are arbitrary, but 5
Considering the dispersibility and effectiveness, a powder having a representative particle size of 5 to 50 μm is suitable.

In addition to these metal powders, a colored pigment or manganese dioxide having a depolarizing function or a carbon blank that acts as a local cathode for the metal powders may be used to promote the elution of the metal powders. It is also possible to add such features within the scope of the present invention.

Suitable methods for applying the paint of the present invention include spray painting, brush painting, roll painting, and troweling if the object is a wall surface, and dip painting or electrostatic painting for fishing nets, etc. However, there are basically no restrictions on the method. In addition, when painting these,
Needless to say, activation treatment or primer coating may be performed as necessary to improve adhesion to the object.

[Effect]

The paint of the present invention can disperse copper-based metal or tin-based metal powder and form a coating layer of an inorganic base by a simple method of coating the object. The coating layer can exhibit an anti-fouling effect over a long period of time. The reason for this is that the second coating layer base is made of an inorganic material, and due to its ion permeability, copper or tin ions gradually diffuse through the base and escape to the surface.
It is believed that the anti-fouling effect can be achieved over a long period of time.

Furthermore, since the paint of the present invention uses a reactively curable base, it can be cured even at room temperature, and even if heating is performed to accelerate curing, it can be done at a relatively low temperature. As a result.

7 Even when applied to organic polymer coatings used in various marine structures, or organic polymer base materials used as seawater-resistant H materials for fishing, etc., these materials will not deteriorate. Never. Therefore, the paint of the present invention can be easily and effectively applied to the surface of an object whose surface is made of an organic polymer material.

Furthermore, the product of the present invention, which is obtained by coating the paint of the present invention on the surface of an object whose two surfaces are made of an organic polymer material, has not only the inherent anti-corrosion function or strength performance due to the surface of the organic polymer material.

The ability of the paint of the present invention to prevent marine organisms from adhering has been greatly improved.
The result is a product with excellent overall performance.

[Example] A net made of polyester fiber with a diameter of 21 mm and a mesh size of 15 mm was subjected to the following three types of treatments to obtain two specimens of the present invention.

A, dip-coating a paint in which 40 parts of pure copper powder having a representative particle size of 10 to 20 μ is added to 100 parts of a 35% solution of an ethyl silicate-based inorganic zinc rich paint base;
Dry for a week.

B. Using a paint with 3 parts of carbon blank added to the above A, immersion/I coating and drying were performed in the same manner.

C1 Using a paint with 3 parts of hinyl butyral resin added to the above 8, dip coated and dried in the same manner.

In addition, as comparative examples, we used an untreated iy) material (D) and a commercially available fishing net (E) with copper powder added to an organic polymer base.
) was tested.

Hang the above net test specimen on a 250x500+ii frame.

As a result of being immersed in the sea in Shirahama Bay, Wakayama Prefecture for 6 months, A.

In contrast to the specimens B and C of the present invention where the slime only adhered to the extent of τJ, one specimen, I7. The comparative example specimen had conspicuous deposits of algae and small Fujibbo, and
A 30% reduction in mesh area was observed.

〔Effect of the invention〕

As mentioned above, the marine life adhesion prevention paint of the present invention contains copper powder and/or
Or, tin powder is added to a reactively hardening inorganic base to form a coating, so unlike conventional ion-permeable glass containing copper powder, it can be applied to any surface simply by painting. Moreover, since it can be easily applied to organic polymeric materials, it has the advantage that it can be applied to anti-corrosion coatings or fishing nets. In addition, there are two products coated with the paint of the present invention.

Compared to conventional painted products made of paints containing metal powder mixed into an organic polymer base, this product has a greater effect in preventing the adhesion of marine organisms and can maintain the effect for a long period of time. Furthermore, the painted product of the present invention, which is obtained by applying the marine life adhesion prevention paint of the present invention to an object whose surface is made of an organic polymer material, has a marine life It has the added effect of preventing biofouling and has excellent overall performance. Like this 1
The present invention provides a non-polluting technology for preventing the adhesion of marine life, and solves all outstanding issues in marine projects at once.

Agent Patent Attorney Kyozo Matsu

Claims (3)

[Claims] (1) A coating for preventing the adhesion of marine organisms, which is characterized in that powder and granules of a copper-based metal and/or a tin-based metal are added to a reaction-curable inorganic base. (2) The marine life-preventing paint according to claim 1, wherein the reactively curable inorganic base is a composition containing an alkyl silicate as a main ingredient. (3) A painted product for preventing adhesion of marine organisms, which is obtained by applying the paint according to claim 1 or 2 to an object whose surface is made of an organic polymeric material.