JP2002205906A - Termite-proofing agent - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a termite-proofing agent which is not only effective against wood vermin but also satisfies environmental conditions and safety conditions. SOLUTION: The termite-proofing agent contains at least one kind out of 2-pyridinethiol-1-oxide copper salt, 2-pyridinethiol-1-oxide zinc salt and 2- pyridinethiol-1-oxide sodium salt, or such a salt together with another termite- proofing agent, or the like.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a termiticide containing a pyrithione compound. Further, a combination of a pyrithione-based compound and at least one of pyrethroid-based compounds, nicotinoid-based compounds, organophosphorus-based compounds, isocyanuric acid-based compounds, carbamate-based compounds, and acetamiprid which are currently used as termiticides. Related to ants.

[0002]

2. Description of the Related Art Conventionally, organotin compounds and the like, which have high efficacy but high toxicity, have been used as termiticides. However, in recent years, importance has been placed on prevention of environmental pollution and safety to human bodies, and their use has been restricted by laws and regulations. Became banned. for that reason,
Although termite repellents mainly composed of natural products are being used, their disadvantages are that the duration of efficacy is too short, and there are many cases where mold has propagated under the floor and wood after construction. is there. On the other hand, copper salts of 2-pyridinethiol-1-oxide (hereinafter abbreviated as Cu-Pt) and zinc salts of 2-pyridinethiol-1-oxide (hereinafter abbreviated as Zn-Pt)
And metal salts of pyrithione represented by sodium salt of 2-pyridinethiol-1-oxide (hereinafter abbreviated as Na-Pt) include various molds (Aspergillus, Pe).
nicholium, Trichoderma, etc.) and wood rot fungi (Coriolus, Tyromyces)
Etc.), bacteria (Pseudomonas, Bacill)
, staphylococcus, etc.), algae or dandruff-causing bacteria (Malassezia), etc., so that various industrial products such as cosmetics, shampoos, detergents, paints, resins, adhesives, oils, and disinfectants for wood, etc. (Or an antibacterial agent) and widely used as an antifouling agent, but not used as an anti-termitic agent.

[0003]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a termiticide which is not only effective against wood pests and the like but also satisfies environmental and safety requirements.

[0004]

Although it has been known that metal salts of pyrithione have a strong antibacterial activity, it has never been known that they have a termite and insecticidal effect against wood pests such as termites and bark beetles. Had not been. The present inventors have studied and found that Cu-Pt, Zn-Pt and Na-Pt have strong termite-controlling effects, especially C-Pt.
The present inventors have found that u-Pt has a strong termite-controlling effect, and completed the present invention.

The present invention contains at least one of a copper salt of 2-pyridinethiol-1-oxide, a zinc salt of 2-pyridinethiol-1-oxide and a sodium salt of 2-pyridinethiol-1-oxide. Or a termitic agent characterized by containing them and other termiticides.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The component (a), Cu-Pt, Zn-Pt and Na-Pt used in the present invention may be used alone or in combination of two or more. . Moreover, it is also possible to use in combination with other termite repellents (b). Examples of other insect repellents (b) include the following agents. Pyrethroid (like) compounds such as silafluofen, etofenprox, bifenthrin, permethrin, cyfluthulin, fenvalerate, tralomethrin, and allethrin. Imidacloprid called nicotinoid compound, (E) -1- (2
-Chlorothiazol-5-ylmethyl) -3-methyl-
2-nitroguanidine (generic name: clothianidin). Organophosphorus compounds such as phoxime, fenitrothion, pyridafenthion, propetanphos, tetrachlorvinphos, dichlorofenthion and the like. Isocyanuric acid compounds such as tripropyl isocyanurate. Carbamate compounds such as fenobcarb, carbaryl and propoxer. Acetamiprid. Boric acid and boric acid calcium, copper,
Metal borates such as zinc and sodium, and boron oxide.

As other components, a bactericidal component, a resin, a fixing agent, a solvent, various additives (adjuvants) and the like may be added as long as the effects of the present invention are not impaired. As the dosage form of the termiticide of the present invention, various forms such as oils, emulsions, wettable powders, aqueous solvents, suspensions, granules, powders, pastes, microcapsules and the like are possible depending on the purpose of use. These dosage forms may be appropriately selected according to the use and purpose of use, and can be prepared according to a conventional method. The termiticide of the present invention exhibits sufficient antifungal and antiseptic performance by itself, but in addition to the above-mentioned components,
Organic iodine fungicides such as iodo-2-propynylbutylcarbamate, 3-bromo-2,3-diiodo-2-propenylethyl carbonate, 2,3,3-triiodoallyl alcohol, tebuconazole, cyproconazole, azaconazole , Fungicides such as hexaconazole, propiconazole and the like, furthermore, 2- (4-thiazolyl) benzimidazole, 2-thiocyanomethylbenzothiazole, methyl-2-benzimidazole carbamate, cyclohexyldiazonium dioxyaluminum, or Cyclohexyldiazonium dioxy copper, 8
-Copper-based disinfectants such as copper oxyquinoline, copper naphthenate, cupric hydroxide, cupric oxide and the like can be added.

The pests to which the termiticide of the present invention is applicable include, for example, the order of the termites of the termites and termites (termites) and the order of the beetles (the beetles) to which the bark beetles such as the bark beetle belong. It has an excellent effect on kinds.

The termiticide of the present invention can be used by kneading or coating into a wire covering material, a synthetic resin sheet base material, a foamed plastic heat insulating material (heat insulating material), or a plywood or LV.
When manufacturing L, a laminated material, or a fiberboard, a product can also be manufactured by blending it with an adhesive. Raw materials such as electric wire covering materials, synthetic resin sheets and foamed plastic heat insulating materials include polyethylene, vinyl chloride, EVA (ethylene-
(Vinyl acetate copolymer), nylon, synthetic rubber, silicone rubber,
Polyurethane, polystyrene and the like are used. As a method for adding the termiticide of the present invention to these resins, a conventional masterbatch method and kneading method can be applied, and no special equipment or technique is required.

The termiticide of the present invention can of course be applied to a conventional method of termite prevention and control, ie, a treatment method of applying to a building member or applying foam. The active ingredient concentration when using the termiticide of the present invention is preferably 0.0
The content is desirably from 0.01 to 10% by weight, preferably from 0.01 to 4% by weight, particularly preferably from 0.05 to 2% by weight.

[0011]

EXAMPLES Next, the effects of the agent of the present invention will be described with reference to examples. Formulation Example 1 Cu-Pt is dissolved in DMSO to prepare a 0.1% by weight solution. Formulation Example 2 A 0.5% by weight suspension is prepared in the same manner as in Formulation Example 1. Formulation Example 3 A 1.0% by weight suspension is prepared in the same manner. Formulation Example 4 A mixture of Cu-Pt and silafluofen at a ratio of 1: 2 (weight ratio) was dissolved in DMSO to obtain 0.1%.
Prepare a 5% by weight solution. Formulation Example 5 Cu-Pt and imidacloprid were mixed at a ratio of 7: 3 (weight ratio) in the same manner as in Formulation Example 4 to obtain a DM.
Dissolve in SO to prepare a 0.5% by weight solution. Cu-Pt; using copper pyrithione manufactured by Yoshitomi Fine Chemical Co., Ltd.

Example 1 Using the preparations described in the above-mentioned formulation examples, in order to examine the termite-controlling effect against termites, the following (Company) Japan Wood Preservation Association Standard No. 11 (1) Laboratory test method "4.3 General test" The test was carried out according to "." That is, 1. Test wood pieces Normal pine or red pine sapwood, size 20x10
It is a rectangular parallelepiped of x10 mm. 2. Test body 110 ± 10 g / m of each concentration of the drug solution described in the above formulation example
^{2 After} applying to the above wood chips and drying at room temperature for more than 20 days,
It is divided into two groups, five with weatherproof operation and five without weatherproof operation. 3. Weathering operation After immersion in static water at room temperature for 30 seconds, the plate is placed in a desiccator filled with water at the bottom and left at 26 ± 2 ° C. for 4 hours. Immediately thereafter, it is left for 20 hours in a circulating hot air oven at 40 ± 2 ° C. 4. Specimen A piece of wood subjected to the weathering operation, a piece of untreated wood, and a piece of untreated wood are dried at 60 ± 2 ° C. for 48 hours, left in a desiccator for about 30 minutes, and the mass of the piece of wood is measured to obtain a test piece. 5. Breeding container An acrylic cylinder having a diameter of 8 cm and a length of 6 cm, one end of which is made of hard plaster solidified to a thickness of about 5 mm is placed in a container with a lid previously covered with wet cotton to a thickness of about 2 cm. 6. Test A test specimen or an untreated test specimen was placed horizontally on an anhydrite in a breeding container, and 150 artificial ants and 15 soldiers taken out of a termite nest were thrown in. 28 containers with lid
Keep the animals in a dark place at ± 2 ° C for 21 days. 7. Results After the elapse of 21 days, the test specimen was taken out, the adhered substance on the surface was carefully removed, dried at 60 ± 2 ° C. for 48 hours, left in a desiccator for about 30 minutes, and weighed. The number of termite ants killed is also recorded. 8. Display of the results The average of the mass reduction rates of the treated and untreated specimens was calculated from the masses of the wood pieces before and after the test, and the results are shown in the following table.

[0013]

[Table 1]

Example 2 The "repellent efficacy" of this drug against house termites was examined by the following method. One half of a round filter paper having a diameter of 9 cm is treated with 0.5 g of a Cu-Pt raw material, and the other half is a non-treated section. Thereafter, the filter paper was placed in a petri dish having a diameter of 9 cm, and as a terminator, the sapwood of Akamatsu (20 ×
10 × 10 mm). Next, 20 house termite ants are put into a Petri dish. 28 ° C, 90% humidity
And observe the termites for 7 days. Z
n-Pt was similarly treated and tested. That is, the number of termites on the treated section and the untreated section of the filter paper was counted with time. With respect to the test results, the number of termites measured over time is shown in Table 2 as “treated / untreated (= example / comparative example)”.

[0015]

[Table 2]

Example 3 A talc, a flame retardant, a pigment, and a foaming agent (organic azo compound) are blended with a polystyrene resin, and the mixture is charged into a hopper 11 of a first extruder 1 shown in FIG. 20
While heating and melting at 0 to 250 ° C., the mixture is uniformly kneaded by rotation of a screw conveyor, and is extruded from the delivery gate 13. In this process, the polystyrene resin is heated barrel 1
2, the delivery gate 13 of the first extruder 1 is in communication with the second extruder 2, and the communication pipe P is used for charging the termite-controlling agent composition into the second extruder 2. Hopper 21 for drug addition is continuously provided, and this hopper 2 for drug addition
A sample of a termite-resistant foamed styrene sheet is molded by introducing the termiticide composition 1 or 2 from 1. The mixture is kneaded with a screw while being heated at a temperature of 180 to 200 ° C. in the heating barrel 2 of the second extruder 2, extruded into a sheet shape from the die 23, and the termite-resistant expanded styrene resin sheet is extruded.

In this embodiment, four types of samples (samples 1 to 4) were prepared and compared with a comparative product to which no termiticide was added. The composition of each sample in the present embodiment was compounded in the following parts by weight. The termiticide composition 1 is a mixed composition of colemanite: CuPt = 5: 1, and the composition 2 is a mixed composition of colemanite: CuPt = 5: 3.

[Table 3] Colemanite: A calcium borate-containing mineral manufactured by Showa Mining Co., Ltd. is used. CuPt; using copper pyrithione manufactured by Yoshitomi Fine Chemical Co., Ltd.

The termite-control efficacy test was carried out in accordance with the “comprehensive test” described in Example 1 above. However, (1) Specimen: A specimen cut into a cube of 30 × 30 × 30 (mm) was tested. (2) Weathering operation: omitted (3) Result: After the test, the longest of the same test pieces perforated by termites was indicated as the perforation degree (mm). The results are shown in Table 4 below.

[0019]

[Table 4]

The above results show that the use of the termiticide of the present invention can clearly protect the target object from termite damage.

[0021]

By using the termiticide of the metal salt of pyrithione of the present invention, it is possible to protect woody materials and resins from pests such as termites and bark beetles. It is possible to protect.

[Brief description of the drawings]

FIG. 1 is a side view of an extruder used to produce a termite-resistant polystyrene resin sheet according to an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 First extruder 11 Hopper 12 Heating barrel 13 Delivery gate 2 Second extruder 21 Chemical addition hopper 22 Heating barrel 23 Die P Communication conduit S Termite-proof foamed polystyrene resin sheet

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) B27K 3/50 B27K 3/50 A C08K 3/38 C08K 3/38 5/34 5/34 5/378 5/378 5 / 49 5/49 C08L 101/00 C08L 101/00 (72) Inventor Mamoru Suka 2-9-1, Hirano-cho, Chuo-ku, Osaka-shi, Osaka F-term in the Research & Development Division, Yoshitomi Fine Chemical Co., Ltd. (Reference) 2B230 AA05 BA01 BA17 CA03 CA06 CB02 CB11 CB13 CB18 CB21 CB25 EB02 EB03 EB21 4H011 AC03 BA01 BA06 BB09 BB11 BB13 BB15 BB16 BB17 DA12 4J002 AH001 BB031 BB061 BC031 EU041 BF031 EB031 CB031

Claims (3)

[Claims] 1. It contains at least one selected from copper salts of 2-pyridinethiol-1-oxide, zinc salts of 2-pyridinethiol-1-oxide and sodium salts of 2-pyridinethiol-1-oxide. A termiticide, characterized in that: 2. At least one member selected from the group consisting of copper salts of 2-pyridinethiol-1-oxide, zinc salts of 2-pyridinethiol-1-oxide and sodium salts of 2-pyridinethiol-1-oxide. , And pyrethroid compounds, nicotinoid compounds, organic phosphorus compounds, isocyanuric acid compounds, carbamate compounds,
A termiticide containing at least one kind (b) of a termiticide selected from acetamiprid and an inorganic boric acid compound. 3. A wood or resin comprising the termiticide according to claim 1 or 2.