JPH0262806A - Aquatic pest-controlling agent - Google Patents

Abstract

PURPOSE:To provide the subject controlling agent containing a specific phospholipid derivative as an active ingredient, preventing damages caused by the adhesion and propagation of pests in sea water or industrial water systems, having low toxicity and persistence and used in a form of an antifouling coating, etc. CONSTITUTION:An aquatic pest-controlling agent contains a compound of the formula [R1 and R2 are H or 1-25C fatty acid residue but R1 and R2 are simultaneously not H; X is H, CH3, C2H4NH2 or C2H4N<+>(CH3)3] (e.g., phosphatidic acid, phosphatidyl ethanolamine or lecithin) as an active ingredient. The compound has a high decomposing property in nature and does not have any problem about the persistence and accumulating property thereof but has a strong controlling effect against microorganisms such as backterial and diatoms in water and large adhered organisms in sea water. When employed as an antifouling agent for antifouling coatings and fishing nets, the compound of the formula is used in a content of 0.5-50wt.% (preferably 1-30wt.%).

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an aquatic pest control agent for preventing damage caused by attachment and breeding of pests in seawater or industrial water systems. In other words, damage caused by fouling organisms on the surfaces of underwater structures such as ships, marine structures, fishing nets, buoys, and seawater conduit pipes, as well as reduced functionality due to slime adhesion and bacteria in paper manufacturing processes, industrial cooling water systems, shield ring water cooling systems, etc. The present invention provides an aquatic pest control agent that prevents damage such as deterioration of water quality due to abnormal breeding of P. aeruginosa.

Conventional technology Fujibbo is used for underwater structures such as ships, offshore structures, seawater conduits for coastal plants, fishing nets, aquaculture rafts, and buoys.
Large attached animals and plants such as mussels and sea lettuce, and microorganisms such as diatoms and bacteria adhere to structures, causing corrosion of structures, increased seawater frictional resistance of ships, large numbers of fish and shellfish dying due to clogging of fishing nets, and settling and work due to increased weight. Damages such as decreased efficiency will occur. In addition, in industrial water systems such as cooling water that uses natural water such as river water and lake water, and in circulation cooling systems that use medium and tap water, bacteria, diatoms, cyanobacteria, etc.
Abnormal growth of blue-green algae causes problems such as deterioration of water quality and lower cooling efficiency due to adhesion to vessel walls. Furthermore, slime generated during the paper pulping process in the paper industry causes a significant deterioration in the quality of paper products.

Conventionally, methods to prevent damage caused by such underwater harmful organisms include the use of chemicals such as inorganic heavy metal compounds, organic metal compounds, heavy metal salts, and inorganic and organic halogen agents. Conventionally, antifouling paints have been applied to surfaces, walls of seawater introduction routes, fishing nets, etc., and agents such as inorganic copper compounds and organic tin compounds are mainly used as antifouling agents in these antifouling paints. It's nine years old.

In addition, in the cooling water system, agents such as organic metal agents, inorganic and organic halogen agents, and peroxides are dissolved or dispersed and added to the aqueous system in the form of yL contact or in combination with a hydrating agent. Control using these agents often does not show sufficient effects at low concentrations of elution and dissolution, and furthermore, effective concentrations are highly toxic and highly persistent, which is undesirable from the viewpoint of environmental health and pollution.

゛2゛□M, 猷'FD Ming is trying to solve Problems in terms of safety, health, and environment with dried sardines, such as ink, low oxidation, and low persistence, which has a negative impact on the ecosystem and work environment. There is a need for an aquatic pest control agent that is free from harmful substances, and it is an object of the present invention to provide such an aquatic pest control agent.

A means for solving the problem is achieved by an aquatic pest control agent characterized by containing the following phospholipid derivative as active ingredient 5. .

That is, in the present invention, a combination of the following general formula (I) is used as an active ingredient, and some or all of the conventionally used antifouling agents are replaced with these compounds in the form of an antifouling paint, or a combination of the general formula (I) is used as an active ingredient. Directly dissolving or suspending one or a combination of two or more of the phospholipid derivatives represented by (I) in a water system,
It is provided as an aquatic pest control agent in the form of an aqueous solution or an aqueous dispersion.

Phospholipid derivatives represented by the general formula (■) are natural surfactants that widely exist in the animal and plant world as phosphatidic acid, phosphatidylethanolamine, and lecithin. , β-diglyceride, etc. are easily synthesized by the method proposed by E. and Boer et al., and these are highly degradable in nature and have no problem with persistence or accumulation. It has a strong control effect against microorganisms and large sessile organisms in the sea, even at extremely low concentrations. Therefore, the amount of elution and dissolution of the aquatic pest control agent according to the present invention in water is sufficiently small to achieve sufficient effects.

When the aquatic pest control agent according to the present invention is used as an antifouling paint or an antifouling agent for fishing nets, one type or a combination of two or more phospholipid derivatives of general formula (I) is added to the paint composition at 0.00%. 5-50% by weight, preferably 1-30% by weight
By containing it, it exhibits a strong antifouling effect for more than one year. In this case, the paint compositions that can be selected may be those conventionally used. For example, the resin vehicle may be organic solvent-based vinyl chloride resin, chlorinated rubber resin, chlorinated polyethylene resin, chlorinated polypropylene resin, Acrylic resin, styrene-butadiene resin, polyester resin, epoxy resin, polyamide resin, petroleum resin, silicone resin, silicone rubber resin, wax, paraffin, rosin ester, rosin resin, and tin, copper, zinc, tellurium Resins containing metal elements in their side chains are used alone or in combination. In addition, examples of aqueous systems include acrylic emulsion resins, epoxy emulsion resins, and vinyl acetate resins. Furthermore, although it is not essential for the antifouling function, it is also possible to incorporate a known antifouling agent as an antifouling agent. In addition, commonly used plasticizers, coloring pigments, extender pigments, solvents, etc. can be contained in arbitrary proportions.

Further, in the production of paints, it can be adjusted by methods known per se in the field of paint manufacturing technology.

On the other hand, when the aquatic pest control agent of the present invention is dissolved or suspended in a cooling water system, etc., one type or a combination of two or more phospholipid derivatives of the general formula (1,) is added to the water system. Added. The amount added to the aqueous system is 0.1 to 50 ppm, preferably 0.5 to 3 ppm as a phospholipid derivative.
Extremely strong control effects can be achieved at concentrations as low as 0 ppm. The method for introducing into an aqueous system is to directly dissolve or physically suspend it in an aqueous system. Further, the input may be continuous or intermittent, and can be arbitrarily selected depending on the water system and the occurrence of pests.

The present invention will be explained below with reference to Examples.

(Left below) Examples 1 to 5 A waterway with a total length of 100 m and an average cross-sectional area of 0.1 m"
The control effect was investigated in an experimental waterway introducing seawater at 0fI. A test solution prepared by mixing 8 g of each phospholipid derivative shown in Table 1 with 10 kg of seawater was added to the waterway entrance every day.
Drip over time.

The effect was investigated on the 10th day from the start of the experiment. The effectiveness was investigated using adhesive boards (hard vinyl chloride boards,
This was done by measuring the wet weight of the organisms grown on a C size (100 x 300 x 3.2 mm) for 10 days, and a system containing no phospholipid derivative was used as a control for comparison.

The results are shown in Table 1.

Note that Table 1 also shows the results of Comparative Example 1 in which no phospholipid derivative was added.

(Leaving space below) In addition, the 1-inch board is installed directly below the A1 test water drop (channel entrance) B: 10 m from the channel entrance C: 25 m from the channel entrance D: 50 m from the channel entrance E: From the channel entrance to the Loom (channel outlet) The test plate was completely submerged in water at each position. In addition, as for attached organisms, slime and small mussels were observed in the control area, but only slime was observed in the experimental areas of the pond.

Examples 6 to 15 and Comparative Examples 2 to 4 SG mill using glass beads for the phospholipid derivative compounds of the present invention shown in Table 2, and other preparations and comparative examples. An antifouling paint and a comparative paint (not containing phospholipid derivatives) were prepared by dispersing the antifouling paint and the comparative paint.An antifouling test was conducted on these antifouling paints and a comparative paint.The antifouling test is shown in Table 2. The antifouling paint and the comparative paint were applied to a 10100 x 300 test steel plate with a commercially available anti-corrosion coating so that the dry film thickness was 60 to 80μ, and after drying for one day, A test raft off the coast of Tamano City, Prefecture, was immersed in algae at a depth of 1m in the sea, and the rate of contamination caused by attached organisms was measured.

As Comparative Example 4, a commercially available steel product coated with the above-mentioned anti-corrosion coating was simultaneously immersed and investigated. The results are shown in Table 3.

(margin) 1-1” Note 1: Laroflex MP-45 Vinyl chloride/vinyl isopropyl ether copolymer made by BASF, West Germany Note 2: KE45-TS Made by Shin-Etsu Chemical - Liquid type room temperature curing product Silicone rubber Note 3:5
H-510 Oil Toray Silicone ■ Methylphenyl silicone oil Note 4: Haloflex 202 Imperial Chemical Industry
ries Water-based vinyl acrylic copolymer RAFUKUSU manufactured by PLC MISUMI (hereinafter referred to as blank space) As can be seen from the examples in Table 1 and above, it is clear that the aquatic pest control agent according to the present invention has extremely good effects.

patent application agent

Claims (2)

[Claims] (1) Formula, ▲Mathematical formula, chemical formula, table, etc.▼ (In the formula, R_1 and R_2 are each H or carbon number 1 to 2.
5 fatty acid residue, except when R_1 and R_2 are both H; Aquatic pest remover. (2) An antifouling paint composition containing 0.5 to 50% by weight of the phospholipid derivative according to claim 1 as an antifouling agent component.