JPH07196403A - Material for preventing submarine organism from attaching - Google Patents

Abstract

PURPOSE:To readily elute an antifouling agent, effectively prevent a submarine organism from attaching and facilitate the installation and removal by mixing a resin for molding processing with the antifouling agent in a specific proportion, providing a molding material and then installing the resultant molding material in equipment where the flow of seawater stagnates. CONSTITUTION:This material for preventing submarine organisms from attaching is obtained by mixing 100 pts.wt. resin for molding processing such as a natural resin, vinyl chloride resin or butadiene resin with 100-1000 pts.wt. antifouling agent and then molding the resultant mixture into a solid form. The material is installed in equipment where the flow of seawater stagnates to elute the antifouling agent into seawater and thereby effectively prevent the submarine organisms from attaching thereto. The antifouling agent used herein is, e.g. cuprous oxide, copper thiocyanate, copper powder, ethylenebis(dithiocarbamato)zinc,-teramethylthiuram disulfide, 2,4,5,6- tetrachloroisophthalonitrile, a benzothiazole-based compound or 2-methylthio-4-t- butylamino-6 cyc lopropylamino-s-triazine.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a material for preventing adhesion of marine organisms, and more particularly, to effectively prevent the adhesion of marine organisms by installing it in equipment where the flow of seawater in ships and offshore structures is stagnant. The present invention relates to a material for preventing adhesion of marine organisms.

[0002]

2. Description of the Related Art Conventionally, in the submerged part of a marine structure such as a ship or a coastal complex, corrosion prevention due to adhesion of marine organisms such as barnacles, hemlock bugs, squirts, mussels, serpras, and algae, and navigation of ships. In order to prevent the speed from decreasing, anti-fouling paint is applied to prevent biofouling. However, seawater flow such as sea chest of ships and seaside complex where seawater flow is very slow becomes a environment where the above-mentioned marine organisms are particularly likely to adhere, so that only an antifouling film is formed on the inner wall surface of the equipment. There was a problem that the method of 1) could not sufficiently prevent the adhesion of marine organisms.

Particularly, the sea chest of a ship is a facility for supplying sea water to a ballast tank, inflowing sea water for cooling engines, and draining water inside the ship. Since sea water is accumulated at the bottom, most of the sea water is in the sea chest. Since the flow of the seawater becomes stagnant, the adhesion of marine organisms becomes significant, making it difficult for seawater to enter and exit, which is a serious problem in the operation of ships. Furthermore, since a great deal of labor and cost are required to remove the organisms once attached, it has been strongly desired to develop a measure for preventing the attachment of marine organisms to a site where the flow of seawater is stagnant.

[0004]

In view of the above problems, the inventors of the present invention have made diligent studies and found that a molding material made of a mixture of a molding resin and an antifouling agent is placed in a facility where the flow of seawater is stagnant. The present inventors have found that the antifouling agent can be dissolved in the sea to effectively prevent the adhesion of marine organisms by installation, and can be easily attached and detached, thereby completing the present invention.

That is, the present invention provides a marine organism adhesion-preventing material obtained by mixing 100 to 1,000 parts by weight of an antifouling agent with 100 parts by weight of a molding resin, and molding the mixture into a solid form. Is.

As the antifouling agent used in the present invention, conventionally known ones can be used. For example, copper antifouling agents such as cuprous oxide, copper thiocyanate, and copper powder, ethylenebis (dithiocarbamate) zinc, tetra Nitrogen-containing sulfur antifouling agents such as methyl thiuram disulfite, 2, 4,
Nitrile compounds such as 5,6-tetrachloroisophthalonitrile, benzothiazole compounds, triazine compounds such as 2-methylthio-4-t-butylamino-6-cyclopropylamino-s-triazine, N, N-
Urea compounds such as dimethyldichlorophenylurea,
Isothiazoline compounds such as 4,5-dichloro-2-n-octyl-3 (2H) isothiazoline, 2,4,6
-Maleimide compounds such as trichlorophenylmaleimide, N- (fluorodimethylthio) phthalimide,
N, N'-dimethyl-N'-phenyl- (N-fluorodichloromethylthio) sulfamide and other N-haloalkylthio compounds, tetracycline compounds, 2-pyridinethiol-1-oxide zinc salt, 2, 3, 5, 6
Examples thereof include pyridine compounds such as tetrachloro-4- (methylsulfonyl) pyridine. These are 1
Or two or more of them may be used, and among them, cuprous oxide, 2-pyridinethiol-1-oxide zinc salt, 4,5-dichloro-2-n-octyl-3 (2H)
Isothiazoline and the like are preferred.

As the molding resin used in the present invention, conventionally known resins can be used without particular limitation. For example, natural resins such as rosin, gum rosin and coumarone, processed natural resins such as ester gum and lime rosin, and epoxy resins. , Polyester resin, polyolefin resin such as polyethylene and polypropylene, acrylic resin, vinyl chloride resin, polyvinyl alcohol, vinyl ether resin,
Examples thereof include chlorinated rubber resins, butadiene resins, styrene resins and copolymer resins thereof, and these may be used alone or in a mixture. Of these, water-soluble resins such as rosin and vinyl ether resin should
It is preferable to use 0% by weight or more.

The proportion of the antifouling agent and the molding resin used is 100 to 100 parts by weight of the molding resin.
The amount is 1,000 parts by weight, preferably 400 to 750 parts by weight. When the amount of the antifouling agent used is less than 100 parts by weight,
If the antifouling performance is not sufficiently exerted and the amount exceeds 1,000 parts by weight, the resulting molding material becomes brittle, which is not preferable.

In the material of the present invention, pigments, plasticizers, organic solvents and other additives may be added to the antifouling agent and the molding resin, if necessary. As the pigments, for example, extender pigments such as calcium carbonate, talc and silica, color pigments such as red iron oxide, titanium oxide, carbon black and zinc white can be used, and examples of the plasticizer include tricresyl phosphate and chlorinated paraffin. Can be used. The organic solvent is used for adjusting viscosity, workability and the like, and for example, aromatic hydrocarbon type, ether type, ester type, ketone type, alcohol type and the like can be used.

The material of the present invention can be obtained by uniformly mixing the above components using a high speed disperser, a super mixer or the like, and molding the mixture into a solid having a size and shape suitable for the intended use. Specifically, after uniformly kneading the above components, the mixture may be poured into a mold having a desired shape for molding, or may be molded by an extruder, for example, rod-shaped, cylindrical, columnar, spherical, plate-shaped, It can be lumpy or the like. The size of the material can be appropriately selected depending on the size of the equipment to be installed, and preferably the surface area in contact with seawater is 50 to 500 cm with respect to the capacity of 1 m ³ in the equipment.
^A size of about ² is appropriate.

The material of the present invention obtained as described above can be installed especially in equipment where the flow of seawater is stagnant. For installation in such equipment, after drying the material, for example, tie it with vinyl-coated electric wire or polyethylene wire with good corrosion resistance, or put the wire into a net and hang it inside the equipment. Or fixed on the wall. It is usually desirable that an antifouling film is formed on the surface of such equipment. In addition, the material of the present invention may be installed not only in one place but also in two or more places depending on the purpose.

[0012]

According to the present invention, a molding material composed of an antifouling agent and a molding resin is installed in equipment such as a sea chest of a ship or a sea water introduction / exit passage in a seaside complex where the flow of seawater is particularly stagnant. By doing so, it is possible to effectively prevent marine organisms from adhering to the inside of the equipment, and moreover, it is possible to easily attach and detach, so that it is possible to save labor and cost in the related art.

[0013]

EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited to these examples. In addition, the part in an example shows a weight part.

Example 1 The following components were uniformly mixed with a twin-screw mixer.

Polyvinyl methyl ether resin 5 parts Butadiene-styrene copolymer resin 5 parts Chlorinated paraffin 2 parts Ethylene bis (dithiocarbamic acid) zinc 50 parts 4,5-Dichloro-2-n-octyl-3 (2H) isothiazoline 20 Part Zinc white 5 parts Xylene 13 parts Total 100 parts The above mixture was molded into a cylindrical shape with a diameter of 8.5 cm and a height of 2.
A marine organism adhesion preventing material having a size of 8 cm was obtained.

Example 2 The following components were uniformly mixed with a twin-screw mixer.

Rosin 5 parts Butadiene-styrene copolymer resin 5 parts Tricresyl phosphate 2 parts 2,4,5,6-Tetrachloroisophthalonitrile 65 parts 2-Pyridinethiol-1-oxide zinc salt 5 parts Bengal 5 parts xylene 13 parts 100 parts in total The above mixture was molded into a cylinder and had a diameter of 3.5 cm and a length of 13 cm.
A marine organism attachment-preventing material having a size of

Example 3 The following components were uniformly mixed with a twin-screw mixer.

Vinyl chloride resin 10 parts Tricresyl phosphate 5 parts Copper thiocyanate 40 parts 2,4,6-Trichlorophenylmaleimide 30 parts Zinc white 5 parts Methyl isobutyl ketone 10 parts Total 100 parts The above mixture is molded into a plate shape. Then, a material for preventing adhesion of marine organisms having a size of 6 × 10 × 2 cm was obtained.

Antifouling performance evaluation test After drying the materials of Examples 1 to 3 on the anticorrosion zinc mounting bolt portion in the sea chest having a size of 2 m ³ and coated with cuprous oxide-containing bottom antifouling paint on the surface The number of polyethylene nets was about 400 cm ^{2 and the} total surface area was fixed. The state of marine organisms attached to the sea chest in the sea chest after 12 months of voyage of the ship having the sea chest was visually observed and evaluated. The results are shown in Table 1.

[0021]

[Table 1]

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Claims (2)

[Claims] 1. A marine organism adhesion preventing material obtained by mixing 100 to 1,000 parts by weight of an antifouling agent with 100 parts by weight of a molding resin, and molding the mixture into a solid form. 2. A method for preventing adhesion of marine organisms, wherein the material according to claim 1 is installed in a facility where the flow of seawater is stagnant.