JP2889304B2 - Pest control agent in water - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an aquatic pest control agent for preventing pests from adhering to seawater or industrial water systems and preventing disturbance by propagation. Ships, marine structures, fishing nets,
Damage caused by fouling organisms on the surface of underwater structures such as buoys, seawater conduits, and deterioration of water quality due to slime adhesion and abnormal propagation of bacteria in papermaking processes, industrial cooling water systems, circulating water cooling systems, etc. It is intended to provide an underwater pesticide for preventing damage.

2. Description of the Related Art Underwater structures, such as ships, offshore structures, seawater conduits of seaside plants, fishing nets and aquaculture rafts, buoys, etc., are used for large adherent flora and fauna such as barnacles, mussels and blue seaweed, and diatoms.
Damage such as corrosion of structures, increased friction between ships in seawater, massive mortality of fish and shellfish due to clogging of fishing nets, sedimentation due to increased weight, and reduced work efficiency occurs due to the attachment of microscopic organisms such as bacteria. Also, in industrial water systems such as cooling water using natural water such as river water and lake water, and in circulating cooling systems that use medium and tap water, bacteria, diatoms, cyanobacteria, blue spiders, etc., proliferate abnormally, Failures such as deterioration of cooling efficiency due to deterioration and adhesion to the vessel wall, blockage of water pipes, and decrease in flow rate are caused.

Conventionally, as a method for preventing such damage by pests in water, control using chemicals such as inorganic heavy metal compounds, organic metal compounds, heavy metal salts, and inorganic and organic halogen agents has been performed. For example, antifouling paint is conventionally applied to the bottom surface of a ship, the surface of a seawater introduction channel, a fishing net, and the like, and the antifouling paint is made of an inorganic copper compound or an organic tin compound as an antifouling agent. Are mainly used.
In the cooling water system, chemicals such as organic metal agents, inorganic and organic halogen agents, and peroxides are dissolved or dispersed directly or in combination with a wettable powder and added to the water system. Control with these agents often does not show sufficient effects at low concentrations of dissolution and dissolution, and furthermore, at effective concentrations, it is simultaneously toxic and highly persistent, which is not preferable from the viewpoint of environmental health and pollution.

Problems to be Solved by the Invention Therefore, there is a need for a water-based pest control agent which has low safety and health and environmental problems, that is, low toxicity and persistence, and which does not adversely affect the ecosystem and the working environment. It is an object of the present invention to provide such a pest control agent in water.

Means for Solving the Problems The above object is achieved by a pesticidal agent in water, which comprises at least one glycolipid derivative as an active ingredient.

That is, in the present invention, a glycolipid derivative selected from a glyceroglycolipid derivative in which diglyceride is bonded to a monosaccharide such as glucose, galactose, fructose, and mannose, or a glycosphingolipid derivative in which a primary alcohol of ceramide is glycosidically bonded to the monosaccharide. One or more of the derivatives are used as active ingredients, and some or all of the conventionally used antifouling agents are replaced by these compounds in the form of antifouling paints, or one or two of the above derivatives
A combination of the above species can be directly dissolved or suspended in an aqueous system and provided as an aqueous pest control agent in the form of an aqueous solution or an aqueous dispersion.

Glycolipid derivatives are substances existing in the living body, and glyceroglycolipids are particularly widely distributed as plant components. Glycosphingolipids are widely distributed in animals, plants, fungi and the like. These are very easily degraded in nature, and their harm is not a problem.
Extremely low concentration has a strong control effect against microorganisms such as bacteria and diatoms in water, and large attached organisms in the sea. Accordingly, the effect of the pest control agent in water according to the present invention in a very small amount of dissolution or dissolution in water is sufficient.

In the present specification, the glyceroglycolipid derivative is represented by the following general formula (I) Means the following.

In the formula, R ₁ and R ₂ are each a fatty acid residue having 12 to 26 carbon atoms, which may be a saturated fatty acid residue or an unsaturated fatty acid residue, or may be linear or branched. Shape.

Specifically, myristic acid, palmitic acid, stearic acid, arachidic acid, behenic acid, lignoceric acid, cerotic acid, palmitooleic acid, oleic acid, elaidic acid, ricinoleic acid, petroselinic acid, vaccenic acid, linoleic acid, linolenic acid There are fatty acid residues such as acids, eleostearic acid, punicic acid, ricanoic acid, parinaric acid, gadolic acid, arachidonic acid, eicosenoic acid, docosenoic acid, cetolic acid, erucic acid, docosadienoic acid, and seracholic acid.

M is a monosaccharide such as curcose, fructose or galactose or a disaccharide residue of lactose, and X _{1 in the} general formula (I) represents a hydroxyl group bonded to the methyl group of the sugar,
It is an inorganic functional group such as a phosphoric acid group or a sulfonic acid group, or an organic functional group such as an alkoxyl group having 1 to 4 carbon atoms, a glucose residue, a fructose residue, a galactose residue, a lactose residue, or a mannose residue.

Japanese Patent Application No. 63-80408 has previously disclosed a pesticidal agent in water containing a glycerophospholipid derivative as an active ingredient.

Like this glycerophospholipid, the glyceroglycolipid in the present invention is also a natural surfactant, but in terms of effect,
The glyceroglycolipids according to the invention are superior.

Particularly digalactosyldiacylglycerol and a and a monosaccharide galactose X ₁ is galactose residue of the general formula (I), with monosaccharides Garasutosu, sulfo keno Bosi Luzia sill glycerol small amounts X ₁ is a sulfonic acid residue The effect is remarkably high.

Glycosphingolipids have the following general formula (II) Indicated by

R _{3 in the} general formula (II) is a fatty acid residue having 12 to 26 carbon atoms, which is the same as R ₁ and R _{2 in} the general formula (I) described above.

R ₄ is a hydrocarbon residue having 12 to 26 carbon atoms, and may be linear, branched, saturated, or unsaturated. M is a monosaccharide or disaccharide residue similar to that described for the general formula (I), and X ₂ is an inorganic functional group such as a hydroxyl group, a phosphate group, a sulfonic acid group, or a C 1 to C 4 group. Examples include an alkoxyl group, a glucose residue, a fructose residue, a galactok residue, a mannose residue and the like, and sugar residues thereof.

Among them, cerebroside in which X _{2 in the} general formula (II) is a hydroxyl group is highly effective in a small amount.

The amount of these glycolipid derivatives used as an antifouling paint composition or an antifouling agent solution for fishing nets is 0.5 to 80% by weight, preferably 1 to 50% by weight. Can be selected. Normally, the use of paints and antifouling agents having concentrations within the above ranges exerts a strong antifouling effect for more than one year. In this case, the coating composition that can be selected may be a conventionally used coating composition. For example, as the resin vehicle, a vinyl chloride-based resin, a chlorinated rubber-based 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 metals such as tin, copper, zinc tellurium A resin containing an element in a side chain or the like is used alone or in combination. Aqueous systems include acrylic emulsion resins, epoxy emulsion resins, and vinyl acetate resins. Further, although not essential for the antifouling function, a known antifouling agent can be further blended as an antifouling aid. In addition, commonly used plasticizers, coloring pigments, extenders, solvents and the like can be contained in an arbitrary ratio. In the production of paint, it can be prepared by a method known per se in the technical field of paint production.

On the other hand, when the pesticidal agent for water according to the present invention is dissolved or suspended in a cooling water system or the like and used, one or a combination of two or more glycolipid derivatives of the general formula (I) is added to the aqueous system. . The amount of the glycolipid derivative to be added to the aqueous system can achieve an extremely strong control effect at a low concentration of 0.1 to 50 ppm, preferably 0.5 to 30 ppm as the glycolipid derivative. The method of charging into an aqueous system is by directly dissolving or physically suspending in an aqueous system. The introduction may be continuous or intermittent, and can be arbitrarily selected depending on the water system and the state of occurrence of pests.

 Hereinafter, the present invention will be described with reference to examples.

Examples 1 to 4 The control effect was studied in an experimental channel in which 400 seawater was introduced per hour into a channel having a total length of 100 m and an average sectional area of 0.1 m ² . First
A test solution in which 8 g of each glycolipid derivative shown in the table is suspended in 10 kg of seawater is dropped at the entrance of the water channel every day for 8 hours. The effects were investigated 10 days after the start of the experiment. Investigation of the effect was carried out on the adhesive plates (hard PVC plate, 1
(00 • 300 • 3.2 mm) for 10 days, the wet weight of the organism was measured, and a system without the glycolipid derivative was compared as a control. The results are shown in Table 1.

Table 1 also shows the results when no glycolipid derivative was added as Comparative Example 1.

The attachment plate is installed at: A: Immediately below the test water drop (channel entrance) B: 10m from the channel entrance C: 25m from the channel entrance D: 50m from the channel entrance E: 100m from the channel entrance (channel exit) Submerged completely. In addition, slime and small mussels were observed in the control plot in the attached organisms, but in all the other experimental plots, only the slime was observed.

Examples 5 to 13 and Comparative Examples 2 and 3 The glycolipid derivative compound according to the present invention shown in Table 2 and the other components and the components of Comparative Example 2 were each dispersed by an SG mill using glass beads, to thereby prevent soiling. Paint and comparative paint (without glycolipid derivative) were prepared. These antifouling paints and comparative paints were subjected to antifouling tests. In the antifouling test, the dry film thickness of a 100 × 300 mm test steel sheet coated with a commercially available anticorrosion coating of the antifouling paint and the comparative paint in Table 2 was applied in advance.
After painting to 60-80μ and drying for 1 day, it was immersed in a test raft off the coast of Tamano City, Okayama Prefecture to a depth of 1m in the sea, and the degree of fouling by attached organisms was investigated.

As Comparative Example 3, a commercially available steel sheet directly coated with the above anticorrosion coating was simultaneously immersed and investigated. Table 3 shows the results.

As can be seen from the above examples, it is clear that the pesticidal agent in water according to the present invention has an extremely good effect.

Continuation of front page (58) Field surveyed (Int.Cl. ⁶ , DB name) A01N 43/16 C02F 1/00 CA (STN)

Claims (5)

(57) [Claims] 1. A pesticidal agent in water comprising at least one glyceroglycolipid derivative as an active ingredient. 2. The pesticidal agent according to claim 1, wherein the glyceroglycolipid derivative is digalactosyldiacylglycerol. 3. The pesticidal agent according to claim 1, wherein the glyceroglycolipid derivative is sulfoquinovosyldiacylglycerol. 4. A pesticidal agent in water comprising at least one glycosphingolipid derivative as an active ingredient. 5. The pesticidal agent in water according to claim 4, wherein the glycosphingolipid derivative is cerebroside.