JPS5953307B2 - Paint for controlling underwater pests - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a paint for controlling aquatic pests.Furthermore, the present invention relates to a paint for controlling aquatic pests, and furthermore, the present invention uses an aralkyl thiocyanate compound represented by the above general formula as an active ingredient, either directly or as a diluent. The present invention also provides a method for preventing underwater harmful organisms from adhering to waterways or underwater structures, equipment, fishing nets, etc. by including the compound in a paint and applying it.

Ships, seawater structures, equipment, machinery, etc. are contaminated with shellfish and seaweed such as mussels, barnacles, snails, hydrozoa, or bacteria and molds, such as bryozoans, bryozoans, Ulva, Aonori, Shiomidro, and Itaboya; It impedes the operation of ships or causes inconvenience in handling.

Conventionally, tin,
Materials containing metal compounds such as mercury, copper, and arsenic were used, but these were not desirable because they corroded the hull material and reacted with hydrogen sulfide in harbor water.

However, the present inventors have discovered that the aralkylthiocyanute compound represented by the above general formula not only has low toxicity to humans and livestock, but also extremely low toxicity to fish and food utensils, and is extremely easy to handle. The inventors have also discovered that the coating exhibits stable effects over a long period of time, and have completed the novel paint for aquatic pests of the present invention.

The paint for controlling aquatic pests of the present invention has the general formula ゜(CH^SCN□CH2SCN , Xn can form tetramethylene and bond to the benzene nucleus.

n represents o or 1 to 5, m represents 1 to 3, and a represents 0, 1 or 2. It contains an aralkyl thiocyanate compound represented by Z as an active ingredient, and consists of this and a coating film forming material. The amount of the aralkyl thiocyanate compound added in the paint is 5 to 60%, preferably 10 to 50%.

As the coating film forming material, commonly used materials are used. That is,
Oil varnish, plastics, synthetic resins such as phenolic resins, vinyl resins, and acrylic resins, artificial rubbers, or products made by crushing pigments and extender pigments therein and mixing and stirring them are used. The addition method can be carried out in accordance with conventional methods for producing antifouling paints, and the aralkyl thiocyanate compound may be added after being mixed with other components, or may be added after being dissolved in a solvent. Next, typical examples of compounds used in the present invention are shown.

These specifically describe compounds that are particularly useful for the purpose of the present invention, and the present invention is of course not limited thereto. In addition, the compound number will be referred to later. Compound 8 Pale yellow transparent liquid Melting point 127-132°C Boiling point 138-141°C/5177d-19 compound
9 Yellow transparent liquid boiling point 115-120℃ / 0.25 1U Compound 10 Pale yellow transparent liquid boiling point 121-122℃ / 15mA Compound 11 Pale yellow transparent oily liquid boiling point 142-145℃ / 1.5"Hy compound 12 Cream-colored powder melting point 49-51°C Compound 13 Colorless plate-shaped crystal melting point 110-114°C Compound 14 Colorless small needle-shaped crystal melting point 211-214°C Compound 15 Cream-colored crystal powder, melting point 207-208°C Compound 16 White powder, melting point 268-268°C 269°C Compound 17 Yellow prismatic crystals Melting point 88-89°C Compound 18 Yellow liquid, boiling point 132°C/0.3"Id-Ifl Compound 19 Yellow-brown viscous liquid, non-distillable compound 20 White needle-like crystals, melting point 132- 134℃ Compound 21 Pale yellow crystal powder, melting point 51-53℃ Compound 22 Colorless transparent liquid Boiling point 105-110℃/0.4v1k19 refractor n
! 5.5 = 1.5548D Compound 23 White crystals, melting point 87°C The aralkyl thiocyanate compound of the present invention has extremely low toxicity to fish and shellfish among marine organisms, and also has low toxicity to algae, and has almost no toxicity. It specifically controls only these living organisms, and is particularly effective against larvae of aquatic pests at very low concentrations.

The paint for controlling aquatic pests made of the aralkyl thiocyanate compound represented by the above general formula of the present invention has the effect of quickly causing asphyxia or asphyxia in seaweed, shellfish, etc. in seawater and freshwater at a low dose. have.

As a result, obstacles caused by mussels, barnacles, snails, hydroids, etc. or seaweed can be easily removed. For example, in the life history of the mussel, which is a typical seawater pest, after the egg is fertilized, it goes through stages called trochophora, D-shaped mussel, ambo stage, etc., from young to adult mussel. It has the effect of significantly bringing larvae up to the ambo stage into a state of asphyxia, and can completely prevent attachment of these larvae at the attachment stage. In addition, barnacles go through a larval stage called nauplius and cypris before becoming adult shells, and these also have a remarkable effect on species up to cypris, and have the same effect as preventing the attachment of mussels. Next, formulation examples will be shown to specifically explain the present invention. % indicates weight percentage. (Formulation Example 1) Each component is kneaded in a kneading machine at a blending ratio of 15% of paint compound (5), 65% of vinyl resin, 10% of aluminum powder, and 10% of red yellow lead to form a paint.

(Formulation example 2) Paint compound (4) 15%, Bengara 15%, Talc 10%, Aluminum stearate 0.5%, Graphite 0.5%
, rosin 29%, foil oil 12%, solvent naphtha 1
Each component is kneaded using a kneader at a blending ratio of 8% to form a paint.

(Formulation Example 3) Each component is kneaded in a kneader at a blending ratio of 15% of paint compound (14), 59% of phenol resin, 13% of aluminum powder, and 13% of yellow lead to form a paint.

(Blend example 4) Paint compound (8) 10%, vinyl resin (vinyl chloride resin) 6
5% aluminum powder, 12% aluminum powder, and 13% Bengara, each component is kneaded in a kneading machine to form a paint.

(Formulation Example 5) Each component is kneaded in a kneader at a blending ratio of 10% of paint compound (21), 65% of vinyl chloride resin, 12% of aluminum powder, and 13% of Bengara to obtain a paint.

(Formulation Example 6) Paint compound (18) 13%, yellow yellow lead 13%, cyanine green 2%, navy blue 0.5%, talc 7%, aluminum stearate 1%, rosin 29%, foil oil 13%, Each component was kneaded using a kneader at a blending ratio of 21.5% solvent naphtha to form a paint.

(Formulation example 7) Paint compound (7) 15%, titanium white 18%, yellow lead 7%, cyanine green 3%, vinyl resin (styrene/butadiene resin) 14.5%, rosin 10%, methyl isobutyl ketone 15% , 17.2% of xylene, and 0.3% of tricresyl phosphate are kneaded using a kneading machine to form a paint.

(Blend Example 8) Each component was mixed at a blending ratio of 25% of paint compound (1), 25% of acrylic resin (copolymer of methyl acrylate), and 50% of thinner to prepare a paint.

These formulation examples specifically describe methods particularly effective for the purpose of the present invention, and are not limited to these, and various formulation examples are possible.

Next, the effects of aralkyl thiocyanate compounds on aquatic pests will be shown.

(Test Example 1) Add the surfactant Solpol (registered trademark) and xylene to each compound, dilute it with seawater to a predetermined concentration, and immerse the larvae of mussels and barnacles, which were artificially hatched or collected from the sea using a plankton net, for 1 hour. After that, the viability and adhesion prevention effect were inspected using a microscope.

The results are shown in Table 1. However, the action characteristics of this drug are shown below. +: Completely prevents adhesion by exhibiting a shellfishicidal effect on larvae.

±: It is not a shellfish killer, but it has a shell-closing effect and a movement-stopping effect, thereby preventing them from attaching.

: Momo is effective in preventing adhesion.

(Test Example 2) 300 x 100 x 1 (Mm) polished steel plate, 11 times of wash primer, 2 times of ship bottom paint No. 1 (commercial product), paint prepared according to Formulation Example 7 or antifouling paint containing zincated copper 2
After coating it twice, it was placed in a wooden frame and immersed in a 1.5m deep seawater raft.

Next, the test coated board immersed in seawater was pulled up at regular intervals and the area of living organisms adhering to the board was measured. The result is second
As shown in the table. Displays are in percentages. The untreated area in the table is the area where Wash Primer No. 1 and Ship Bottom Paint No. 1 were applied.

In the area where the present invention was used, adhesion of algae could be sufficiently prevented, and the painted surface was also in good condition.

(Formulation Example 3) The paint prepared according to Formulation Example 8 was applied to a polyethylene fishing net (
50 pieces, 8 sections), and after air drying, the temperature was 0.5 to 2.0 below the sea level.
The specimen was hung for 3 months and the state of adhesion was observed over time.

Tests were conducted periodically. Efficacy was determined in stages according to the status of attachment of attached organisms as follows. The results are shown in Table 3. ：Those with almost no sessile organisms seen±
: Items with a small amount of attached organisms + : Items with a small amount of attached organisms

Claims (1)

[Claims] General formula ▲ Numerical formula, chemical formula, table, etc. ▼ Or general formula ▲ Numerical formula, chemical formula, table, etc. ▼ (In the formula, X is a nitro group, a lower alkyl group, a halogen atom,
Indicates an acetyloxy group or a thiocyanomethyl group, Xn
can be bonded to the benzene nucleus to form tetramethylene. n represents 0 or 1 to 5, m represents 1 to 3, and a represents 0, 1 or 2. ) A coating for controlling aquatic pests, characterized by containing an aralkyl thiocyanate compound as an active ingredient.