JPS6126882B2 - - Google Patents

Description

[Detailed description of the invention]

TECHNICAL FIELD The present invention relates to an agent for preventing the adhesion of nut, and more particularly to an agent for preventing adhesion of nut, which contains N-(4-fluorophenyl)-2,3-dichloromaleimide as an active ingredient. Fine particles (slime) that adhere to substrates immersed in seawater or freshwater, such as underwater structures, fishing nets, ships, etc.
It is composed of bacteria, diatoms, other microorganisms, and organic and inorganic detritus, and depending on the main composition, it takes the form of granules, gelatin, and silt, but it is generally called "water scale" or "dirt". However, fishermen call it ``Nuta''.
It is called. Originally, the sessile organisms that obstruct fishing nets, ship bottom paints, and underwater structures in seawater and freshwater were mainly large animals and plants such as sea lettuce, seaweed, sponges, moss, oysters, mussels, barnacles, and sea squirts. . However, in recent years, except in areas where there is a significant inflow of open ocean water, the attachment of cottonmouths and the damage caused by them has become a problem, and they have become a sessile sessile that has replaced conventional sessile organisms such as large animals and plants. ing. This is due to increased pollution of lake water and seawater, and as a result,
This has a large effect on the growth conditions of periphyton, and is manifested in changes in the periphyton layer. In particular, in fish farms, etc., some of the breeding feed and the excrement from the fish accumulate, resulting in contamination.
Although the situation has become extremely high, these conditions serve as a source of nutrients for the growth of wild nut, and have a significant impact on their proliferation and growth. Under such conditions, the attachment and growth of the nut is extremely rapid; for example, in the case of a net for a fish cage, after one to two weeks they will be attached to the entire net. The attachment of nutfish not only impedes the passage of water through the net, but also creates a breeding ground for pathogenic insects and germs, putting the fish being farmed at risk of disease. In addition, if we closely observe the changes in sessile organisms during the early stages of adhesion, we find that the adhesion of wild nut significantly accelerates the adhesion of conventional adhesion-obstructing organisms such as sea lettuce, sea squirt, silver grass, sponge, lily moss, oyster, and barnacle. It became clear that there was. In this way, it has been revealed that, in addition to the damage to the nut itself, the effects on the attachment and growth of large animals and plants cannot be ignored. As mentioned above, the present inventors conducted a search for a drug effective for controlling the cottonmouth, considering that the rat is a fouling organism that should be given great importance. Conventionally, organic tin-based agents have been widely used as antifouling agents for this kind of deposits, but even these agents are not sufficiently effective against cottonmouths and are heavy metal compounds. Therefore, it has been pointed out that there are many problems in terms of safety. Furthermore, Japanese Patent Application Laid-Open No. 53-9320 discloses an aquatic organism repellent containing N-arylmaleimides as an active ingredient. However, the disclosed compounds are
It was found that it has almost no effect against nuta. The present invention was made in view of the above-mentioned current situation, and
The purpose is to be highly safe and highly effective against nuts.
Moreover, the aim is to provide a drug that is effective against conventional target organisms. The anti-fog adhesion agent of the present invention contains N-(4-fluorophenyl)-2,3-dichloromaleimide as an active ingredient. It can be mixed into water and applied to ships, fishing nets, and other structures, and as a control agent for waterways, etc., it can be applied by continuous, intermittent, or impact injection into the water. However, it shows high activity. When this agent is mixed into paint and used, 0.1
If the content is 30% to 20%, preferably 2 to 20%, the desired effect of preventing the adhesion of nut can be achieved. In addition, when used by injecting into water, the concentration of the drug in water is 0.01 to 500 ppm, preferably 0.05 to 500 ppm.
A concentration of 50ppm is good. Regarding injection into water, the one containing a surfactant did not require particular selection of the location for drug injection, and the effect was more uniform, resulting in remarkable results. Next, examples of the present invention will be described.
The compounding materials, compounding ratio, etc. are not limited to these, and can be varied within a wide range. Example 1 10 parts of N-(4-fluorophenyl)-2,3-dichloromaleimide, 8 parts of rosin amine, 8 parts of chlorinated rubber, 5 parts of dioctyl phthalate, 25 parts of xylene
1 part and 44 parts of methyl isobutyl ketone and knead until uniform to form a product. Example 2 10 parts of N-(4-fluorophenyl)-2,3-dichloromaleimide, 8 parts of rosin amine, 5 parts of acrylic acid resin, 5 parts of dioctyl phthalate, 35 parts of xylene and 37 parts of isopropyl alcohol were blended, Knead until homogeneous and make the product. Example 3 10 parts of N-(4-fluorophenyl)-2,3-dichloromaleimide, 10 parts of acrylic acid-based aqueous resin
10 parts of vinyl acetate water-based resin, 5 parts of dioctyl phthalate, 3 parts of methyl carbitol, 15 parts of ethylene glycol, and 47 parts of ethylene glycol. do. Example 4 10 parts of N-(4-fluorophenyl)-2,3-dichloromaleimide, 10 parts of Sorbol (activator manufactured by Toho Chemical Co., Ltd.), 35 parts of N,N-dimethylformamide, and 45 parts of xylol were blended. Product. Example 5 5 parts of N-(4-fluorophenyl)-2,3-dichloromaleimide, 25 parts of zinc white and 15 parts of pine resin,
Add 95 parts of varnish consisting of 30 parts of drying oil and 50 parts of terpene, and knead until homogeneous to form a product. Comparative Example 1 10 parts of tributyltin oxide (TBTO), 8 parts of rosin amine, 5 parts of acrylic acid resin, 5 parts of dioctyl phthalate, 35 parts of xylene, and 37 parts of isopropyl alcohol are blended and kneaded until uniform. Adjust the viscosity using a small amount of xylene and make the product. Comparative Example 2 10 parts of N-(4-chlorophenyl)maleimide,
8 parts of rosin amine, 5 parts of acrylic acid resin, 5 parts of dioctyl phthalate, 35 parts of xylene, and 37 parts of isopropyl alcohol (IPA) are blended and kneaded until uniform. Use a small amount of xylene to adjust the viscosity and create a product. Comparative example 3 N-(4-fluorophenyl)maleimide 10
parts, 8 parts of rosin amine, 5 parts of acrylic acid resin,
Blend 5 parts of dioctyl phthalate, 35 parts of xylene, and 37 parts of isopropyl alcohol, and knead until uniform. Adjust the viscosity using a small amount of xylene and make the product. Next, the present invention will be specifically explained with reference to test examples. Test Example 1 A polyethylene fishing net was cut into pieces of 50 cm x 50 cm, immersed in the paints obtained in Examples 1 and 2 and Comparative Examples 1, 2, and 3 for 3 minutes, dried, and then placed under the sea surface (for sea areas). (inner bay where there is little inflow of ocean water), hang down within 1 m, and check the degree of growth of cottonmouth after 4 weeks.
The efficacy of the drug was determined based on the increase in net weight.

[Table] In the experimental sea area, after 4 weeks there was only the adhesion of hag, but the effectiveness of the drug of the present invention in preventing the adhesion of hag was remarkable. Test Example 2 Example 2,
3 and Comparative Examples 1 and 2 were applied twice,
It hangs 1 to 2 meters below the sea level (the sea area is an inner bay where a relatively large amount of open ocean water flows in, and there are particularly many deposits of cottontail, hydra, and sea lettuce), and it is pulled up every five days to remove the deposits of cottontail, hydra, and sea lettuce. Observed.

【table】

[Table] Test example 3 Confirmation test of drug efficacy in seawater cooling channel. The test was conducted using a one-time cooling water system with a seawater flow rate of 10,000 m ³ /
Time: For 3 months during the winter season, 10 kg of the drug prepared based on Example 4 was injected once a day for 1 hour (drug concentration in seawater was 1 ppm). Place a 10cm x 10cm slate board and
After 1 day and 3 months, the scum adhering to the slate (front and back) was scraped off, the weight was measured, and the efficacy of the drug was determined.

[Table] N-(4-fluorophenyl)-2 of the present invention,
3-Dichloromaleimide is particularly superior in its ability to prevent the attachment of nut to other substances than other N-(4-halogenophenyl)-2,3-dichlormaleimides, and experimental examples thereof are shown below. Polyethylene fishing nets were cut into pieces of 50 cm x 50 cm and coated with the paint of Example 1 and various types of N as comparative examples.
-(4-halogenophenyl)-2,3-dichloromaleimide was immersed in a paint containing 2,3-dichloromaleimide for 3 minutes, dried, and then dropped within 1 meter below the sea surface (inner bays where there is little inflow of ocean water) for 2 weeks. Then, the degree of growth of cottonmouth adhesion after 4 weeks and the degree of growth of attached organisms after 8 weeks were observed. Judgment Criteria: Nuta - No stray particles are observed on the screen fabric. + Nuta adhesion is observed on 1/3 of the surface of the mesh fabric. ++ Nuta is observed on more than 1/3 of the surface of the screen fabric. +++ Nuta adhesion can be seen on more than 2/3 of the surface of the mesh fabric. ++++ Nuta adhesion can be seen on the entire surface of the mesh fabric. General fouling organisms - No fouling is observed on the screen surface. + Growth of deposits (hydra, moss) can be seen on 1/3 of the screen surface. ++ Growth of deposits is observed on more than 1/3 of the surface of the mesh fabric. +++ Growth of deposits is observed on more than 2/3 of the surface of the mesh fabric. ++++ Growth of deposits can be seen on the entire surface of the fabric.

[Table] As is clear from the above description, according to the present invention, it is possible to sufficiently prevent the attachment of nutfish, and therefore it greatly contributes to the fishing industry.

Claims (1)

[Claims] 1. A nut adhesion prevention agent characterized by containing N-(4-fluorophenyl)-2,3-dichloromaleimide as an active ingredient.