JPH08319203A - Aquatic antifouling agent - Google Patents

Abstract

PURPOSE: To obtain an antifouling agent for fishing net, containing bis(dimethyldithiocarbamoyl) ethylenebisdithiocarbamic acid zinc salt as an active component, having low toxicity and high dispersion stability and exhibiting excellent controlling effect over a long period against coelenterate such as hydrozoan. CONSTITUTION: This aquatic antifouling agent for preventing the adhesion of coelenterate contains bis (dimethyldithiocarbamoyl) ethylenebisdithiocarbamic acid zinc salt as an active component. The bis(dimethyldithiocarbamoyl) ethylenebisdithiocarbamic acid zinc salt has an average particle diameter of <=2μm to improve the dispersibility and the agent further contains at least one kind of substance selected from di-t-nonylpentasulfide, polybutene, a paraffin and petrolatum as a dissolution controlling agent.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fishing net for aquaculture or stationary, and materials used for these such as floats and ropes, as well as ship bottoms, underwater structures, etc., to which coelenterates such as hydrozoa adhere. The present invention relates to an underwater antifouling agent containing zinc bis (dimethyldithiocarbamoyl) ethylenebisdithiocarbamate, which is useful as an antifouling component of an underwater antifouling composition.

[0002]

2. Description of the Related Art Aquaculture or stationary fishing nets, ship bottoms, underwater structures, etc.
The marine fouling organisms such as barnacles, cerpra, bryozoans and molluscs are heavily attached to them, hindering their economic operation, and they are currently spending a great deal of effort and cost to maintain them. In particular, the development of selective active ingredients that prevent the adhesion of coelenterates such as hydrozoa has been awaited.

Various studies and proposals have been made as measures against this, but it is known that a series of organotin compounds are effective in practice. However, these organotin compounds are generally highly toxic, and careless handling of products containing them may cause troubles to the operator, and are disadvantageous in terms of environmental measures.

For these reasons, the advent of low-pollution underwater antifouling agents is desired. For example, Japanese Patent Publication 51-10849
JP-A-60-38306, JP-A-63-284275, and JP-B-1-11606 disclose tetraalkylthiuramdisul in tetraalkylthiuramdisul. Various antifouling agents for fishing nets, antifouling paint compositions, and fishing net antifouling solutions in which a Fid compound and other underwater antifouling compounds are combined are disclosed in Japanese Examined Patent Publication No. 61-50984, which describes 3-isothiazolone compounds. Japanese Patent Fair 1
No. 20665, Japanese Patent Publication No. 2-24242, and Japanese Patent Laid-Open No. 53-9320 disclose antifouling paints containing a maleimide compound as an active ingredient.

However, all of these antifouling agents in water have a weak effect of preventing adhesion to coelenterates such as hydrozoa and cannot be put to practical use.

[0006]

SUMMARY OF THE INVENTION The present invention has low pollution
In particular, it is an object of the present invention to provide a practical underwater antifouling agent having an excellent antifouling effect against the adhesion of coelenterates such as hydrozoa.

[0007]

The present inventors, except for the above-mentioned drawbacks of conventional underwater antifouling agents, have low toxicity, low risk of environmental pollution, high safety and good workability. As a result of diligent research on antifouling agents, zinc bis (dimethyldithiocarbamoyl) ethylenebisdithiocarbamate shows excellent antifouling effect against coelenterates such as hydrozoa, and further shows practical formulation characteristics. The present invention has been completed and the present invention has been completed.

That is, the present invention provides (1) an underwater antifouling agent for preventing adhesion of coelenterates, which comprises zinc bis (dimethyldithiocarbamoyl) ethylenebisdithiocarbamate as an active ingredient, and (2) an average particle diameter. An underwater antifouling agent having improved dispersibility, which contains zinc bis (dimethyldithiocarbamoyl) ethylenebisdithiocarbamate of 2 μm or less, and (3) ditertiary nonylpentasulfite as an elution regulator. At least one selected from polybutene having an average molecular weight of 200 to 1000, paraffins, and vaseline.
The present invention relates to the underwater antifouling agent (1), which contains a seed.

The zinc bis (dimethyldithiocarbamoyl) ethylenebisdithiocarbamate of the present invention has a repellent effect remarkably enhanced by using particles having an average particle diameter of 2 μm or less, and further particles in a dispersed suspension state can be obtained. It was possible to improve workability during production by not allowing sedimentation for a long time. That is, filling with a uniform composition became possible.

The compounding amount of the zinc bis (dimethyldithiocarbamoyl) ethylenebisdithiocarbamate of the present invention is
The underwater antifouling agent can be arbitrarily changed depending on the application target and application environment, and is not particularly limited, but is usually 3 to 30.
%, Preferably 5 to 20% by weight.

Polybutene having an average molecular weight of 200 to 1000 used as a dissolution modifier is, for example, a product of Nippon Oil Co., Ltd. and has trade names LV-5 and LV-1.
0, LV-25, LV-50, V-100, HV-1
5, HV-35, HV-50, HV-100, etc., but not limited to these products, and may be a mixture thereof.

The paraffins used as the dissolution modifier include, for example, liquid paraffin, paraffin wax, chlorinated paraffin, etc., but are not particularly limited to these, and a mixture thereof. Good.

Further, petrolatum used as an elution regulator includes white petrolatum and yellow petrolatum.

The compounding amount of the compound selected from ditertiary nonylpentasulfide, polybutene, paraffins and petrolatum used as an elution regulator is 3 to 20% by weight, preferably 5 to 10% by weight. . The mixing ratio of each elution regulator can be arbitrarily set depending on the use conditions.

The underwater antifouling agent of the present invention is used in the form of a dispersion paint and can be easily produced by a usual method. For example, as an antifouling agent for fishing nets, zinc bis (dimethyldithiocarbamoyl) ethylenebisdithiocarbamate, and at least one resin selected from ditertiary nonylpentasulfide, polybutene, paraffins and petrolatum as an elution regulator are used. In addition, it may be dispersed with a solvent. The resin used here includes, for example, rosin resin, acrylic resin, polybutene resin, chlorinated rubber resin, vinyl chloride resin, alkyd resin, coumarone resin, ethylene-vinyl acetate resin, and one or more of them. You may use together the above. As the solvent, xylene, solvent naphtha, pseudocumene, butanol, isopropanol,
Examples include methyl isobutyl ketone, diethylbenzene, triethylbenzene, mesitylene and the like.

[0016]

The underwater antifouling agent of the present invention has low toxicity and high safety, and exhibits an excellent antifouling effect against coelenterates such as hydrozoa for a long period of time.

[0017]

EXAMPLES Examples will be shown below, but the present invention is not limited thereto. The composition in the examples is% by weight.
Indicates.

Example 1 According to the following formulation example, each component was mixed and dispersed to prepare an antifouling agent for fishing nets.

Prescription Example 1 Zinc bis (dimethyldithiocarbamoyl) ethylene bisdithiocarbamate (average particle size 1.5 micron) 10% Ditertiary nonylpentasulfide 5% Liquid paraffin (reagent) 5% Acrylic resin (50 % Xylene solution) 40% xylene 40%

Reference Formulation Example 1 Copper bis (dimethyldithiocarbamoyl) ethylenebisdithiocarbamate (average particle diameter 2.0 μm) 8% Ditertiary nonylpentasulfide 5% Yellow petrolatum 5% Acrylic resin (50% xylene Liquid) 40% xylene 42%

Reference Formulation Example 2 Manganese bis (dimethyldithiocarbamoyl) ethylenebisdithiocarbamate (average particle size 2.0 μm) 8% Polybutene (HV-35) 5% Liquid paraffin (reagent) 5% Acrylic resin (50% Xylene liquid) 40% xylene 42%

[0022]

【The invention's effect】

Experiment 1 The antifouling agent for fishing nets of Example 1 of the present invention was applied to polyethylene knotless nets (6 sections, 400 denier / 60 pieces) by dipping and air-dried, and then from June 1991 in Tanabe Bay, Wakayama Prefecture. It was kept in the sea about 5 m below sea level and the state of adhesion of coelenterates such as hydrozoa to the net was investigated. The results were evaluated according to the criteria shown in Table 1.

[0023]

[Table 1]

The comparative formulation is as follows. Comparative Example 1 Tetraethylthiuram disulfide 15% Acrylic resin (50% xylene solution) 50% Xylene 35% Comparative Example 2 Copper bis (dimethyldithiocarbamoyl) ethylenebisdithiocarbamate (average particle size 5.0 microns) 8% Di Tertiary nonyl pentasulfide 5% Yellow petrolatum 5% Acrylic resin (50% xylene solution) 40% Xylene 42% The results are shown in Table 2.

[0025]

[Table 2]

As shown in Table 2, the fishing net antifouling agent of the present invention containing zinc bis (dimethyldithiocarbamoyl) ethylenebisdithiocarbamate as an active ingredient has a long-lasting practical use for coelenterates such as hydrozoa. It has been found that it is possible to provide an antifouling agent that exhibits a good effect, has low toxicity, high safety, and good dispersion stability.

Claims (3)

[Claims] 1. An underwater antifouling agent for preventing adherence of coelenterates, which comprises zinc bis (dimethyldithiocarbamoyl) ethylenebisdithiocarbamate as an active ingredient. 2. An underwater antifouling agent having improved dispersibility, which comprises zinc bis (dimethyldithiocarbamoyl) ethylenebisdithiocarbamate having an average particle diameter of 2 μm or less. 3. At least one selected from the group consisting of ditertiary nonylpentasulfide, polybutene having an average molecular weight of 200 to 1000, paraffins and petrolatum as an elution regulator. The underwater antifouling agent according to claim 1.