JPS59216805A - Repellent for aquatic life - Google Patents

Abstract

PURPOSE:To provide the titled low-toxic repellent, capable of extremely effectively controlling the fouling aquatic life such as shells, algae, mollusks, etc. e.g. barnacle, oyster, mussel, etc., and useful for the protection of ship's bottom, fishing-net, etc., by using a thioxanthone comound as an active component. CONSTITUTION:The objective repellent contains the thioxanthone compound of formula (R is H, halogen, lower alkyl, lower alkoxy, hydroxyl, amino, trifluoromethyl, or nitro) as an active component. It is used in the form of paint, solution, emulsion, etc. by mixing with various adjuvants, film-forming agents, etc. For example, for the preparation of a paint, the titled agent is compounded with a film-forming agent, e.g. an oil such as linseed oil, a synthetic resin such as polyvinyl chloride, a rubber derivative such as chlorinated rubber, etc., and optionally with a solvent or diluent such as an alcohol to improve the applicability, or iron oxide, talc, etc. as a coloring pigment. The amount of the active component is preferably about 1-20wt%.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an aquatic organism repellent containing thioxant/s as an active ingredient).

Intake channels such as the bottom of ships, fishing nets, buoys, etc. placed in seawater, underwater structures such as dams, cooling water for condensate panels in thermal power plants, water for cooling heat exchangers in various industries, etc. etc'm
The parts that come into contact with ice water should be filled with
Due to the propagation of bryozoans, sea squirts, sea squirts, sea squirts, sea squirts, sea breams, sea breams, etc., ships are forced to slow their sailing speeds in the evening.

This will only lead to an increase in fuel consumption (.

This can lead to economic losses due to cleaning costs for cleaning the bottom of the ship, or to the ship's operating body during this cleaning period, and in the case of underwater structures, it will cause inconvenience in handling operations. 1, condenser.

In intake channels for heat exchangers, etc., the amount of water decreases.

Not only does the cooling efficiency decrease (but the biomass that falls off the channel walls and is washed away causes major losses, such as deteriorating the performance of equipment). Various antifouling agents are used to prevent adhesion and propagation.The active ingredients of such antifouling agents include heavy metals (such as copper oxide, copper oxide, etc.).
organic tin compounds) and harmful elements (e.g. chlorine, phosphorus,
A large number of substances containing arsenic (such as arsenic) have been known and used.

Recently, heavy metals and harmful elements in rivers are causing social problems such as polluting the environment such as seawater and causing harm to the human body through G-borne gas transmitted through fish.

As a result of intensive research by the present inventors to develop a low-toxicity non-metallic antifouling agent that is effective in preventing the attachment of harmful aquatic organisms,
The present inventors have discovered that thioxanthone compounds are effective as antifouling agents for harmful aquatic organisms, and have completed the present invention.

That is, the uninvented compound has the general formula (wherein R is a hydrogen atom, a halogen atom, a lower alkyl group, a lower alkoxy group, a hydroxyl group, an amine group.

Indicates trifluoromethyl group and nitro group. ) is an aquatic organism repellent containing i#R as an active ingredient and contains a low amount of thioxanthone.

The thioxanthone of the general formula CI) used in the present invention includes, for example, those represented by R or 1 in formula 1.

3- These compounds are known as photopolymerization initiators and are synthesized by known methods. Namely.

U.S. Patent No. 2951082, Pharmaceutical Journal, Volume 89, 112
~117 pages (1969), Japanese Patent Application Laid-Open No. 1983-105678, J, Ohem, Soc, part
1, p. 747, N951).

The aquatic organism repellent of the present invention may be used in the form of a composition having appropriate properties and form depending on the purpose of use, according to a conventional method in this technical field. for example.

The aquatic organism repellent of the present invention can be blended with various adjuvants, film-forming agents, etc., and used as paints, bath solutions, emulsions, and hydrating agents.

use. More specifically, the aquatic organism repellent of the present invention is blended with a film forming agent, prepared in the form of a paint, and used by coating. As a coating film forming agent in this case.

Oil-based oils such as linseed oil, soybean oil, tung oil, hempseed oil, PoIJ
ffl vinyl, chlorinated polyethylene, acrylic.

Examples include synthetic resins such as urethane and polyester, rubber derivatives such as chlorinated rubber, synthetic rubber, and artificial rubber, as well as rosin, pitch, tar, copal, and oil varnish. In this case, a solvent or diluent may be added to make the paint easier to apply.As a solvent or diluent,
It varies depending on the type of coating material, alcohols, aliphatic hydrocarbons.

Examples include aromatic hydrocarbons, ketones, esters, and ethers. When preparing a colored paint, a pigment may be appropriately added. At this time, inorganic substances such as extender pigments, iron oxide, talc, clay, and sandstone may be added. The content of the aquatic organism repellent of the present invention in such a formulation is not particularly limited, but is preferably about 1 to 20% by weight.

It is also possible to prepare an emulsion solution using a solvent and a surfactant.

As described above, the aquatic organism repellent of the present invention is suitable for use against, for example, fujibo, oyster, purple sea bream, and water bug.

Serpura, bryozoans, sea squirts, sea lettuce, and green seaweed.

It is useful for protecting ship bottoms, fishing nets, buoys, underwater structures, and cooling water intake channels because it can extremely effectively control aquatic fouling organisms such as shellfish, algae, and molluscs.

Next, the present invention will be explained in more detail based on examples. In addition, the section in one example indicates the weight section. The compounds used in the examples are as follows.

Compound 1 2-Methylthioxanthone Compound 2 2-Ethylthioxanthone 6- Compound 3 2-1-Propylthioxanthone Compound 4 2-n-Propylthioxanthone compound $5 2-t-Butylthioxanthone Compound 6 2-Trifluoromethylthioxanthone 7'ton Compound 7 3-chlorothioxanthone Compound 8 6-promothioxanthone compound? l9 4-chlorothioquinone Example Artθmia 5alina cultivated in artificial mud water
19 ml of artificial seawater containing 10 Fujibbo larvae (tested as a substitute for Fujibbo) was transferred to a petri dish with a diameter of 5 cm.

Test drug fd) b II 9 Ocyclohexanone-T
A 1Of emulsion is made with an emulsifier consisting of ween -807- (10:1) and diluted with artificial seawater to a predetermined concentration. 1 ml of this was added to the test dish described above, and the drug concentration in the artificial seawater was adjusted to 10.
1.0. 0. The number of dead individuals after 24 hours was counted as i ppm. This test was repeated three times to determine the mortality rate.

The results are shown in the table below.

8-

Claims (1)

[Claims] (In the formula, R represents a hydrogen atom, one halogen atom, a lower alkyl group, a lower alkoxy group, a hydroxyl group, an amine group, a trifluoromethyl group, a nitro group.) An aquatic creature repellent characterized by comprising: