JPS6393701A - Control of termite - Google Patents

Abstract

PURPOSE:To enable the control of termite preventing the loss of active component with water, by applying an epoxy resin emulsion containing a termite- controlling agent in contact with a hardener, thereby forming a coating film to the part to be subjected to termite-controlling treatment. CONSTITUTION:An emulsion of an epoxy resin (preferably glycidyl-type resin) containing a termite-controlling agent such as chloropyrifos is made to contact with a hardener (preferably a modified polyamide, etc.) to obtain a two-pack contact type emulsion. The emulsion is applied to wood part such as flooring material and pillar material of house or soil under the floor of a house or its circumference and then hardened to form a coating film to the part to be treated. Termite damaging a house can be controlled by this process. The applied active component is protected from hydrolysis or decomposition with soil bacteria and the dissipation of the component harmful to human is prevented to highly contribute to the safety of worker and habitant.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention is directed to a termite control agent for appropriately preventing or controlling termites that cause serious damage to houses. The method is characterized in that the underfloor upper TL is treated and hardened around it to form a treated film.

[Prior Art and Problems] Hitherto, chlordane has been most often used as a general termite control agent. Redene was often used because of its strong insecticidal properties and residual effects. However, due to its high persistence in nature, environmental pollution and inertial toxicity associated with liver damage became a problem, making it difficult to use. Under these circumstances, organophosphates (chlorpyrifos,
pyridafenthione, phoxim, etc.), pyrethroids (
Insecticides such as pyrethrin, allethrin, etc.) are being considered, but pyrethroids lack long-term stability and cannot fully achieve the purpose of termite control agents that require long-term maintenance of insecticidal efficacy; Because it inactivates the cholinesterase enzyme necessary for controlling muscle contraction for proper transmission of nerve pulses in humans, exposure to the ceiling may cause poisoning symptoms. There is a problem in terms of

Next, conventional methods for preventing or controlling termites include applying oil or emulsion to wooden parts such as flooring and pillars, spraying, or applying foam to the areas where termites live. And the soil that is the passageway is sprayed with emulsion, applied with foam powder, or sprinkled with powder. However, with this method, it is necessary to apply the active ingredient in an amount of about 50 to 1009 per m2 of soil surface, or the active ingredient may leak out from the wood of the foundation etc. under the floor where there is a lot of moisture such as in the kitchen or bathroom. If it is not stored away, rainwater enters, or moisture moves in the soil, there are problems such as the active ingredients in the soil flowing out and mixing with groundwater or contaminating other areas. Measures to solve these problems include laying sheets containing termite control agents on the soil surface or foundations under floors, and water-soluble emulsions containing termite control agents (ethylene vinyl acetate copolymer, vinyl acetate + PVA, etc.). ) is available. However, the sheet-laying method has the disadvantage that cutting the sheet to fit the shape of the foundation is cumbersome, and there is a gap between the sheet and the foundation, making it difficult to achieve a complete termite prevention effect. In methods of spraying water-soluble emulsions such as ethylene vinyl acetate co-p combination and vinyl acetate + PVA, it takes a long time to form a dry film, so much of the emulsion is absorbed into the soil by the time the film is formed. The drawback is that the chemical solution permeates into the liquid, resulting in a large loss of chemical solution.

[Means for Solving the Problems] As a result of various studies conducted by the present inventors in order to solve the problems of the conventional methods as described above, the present inventors have developed a main ingredient and a curing agent for an epoxy resin emulsion containing a termiticide. When the type emulsion is applied in contact, it forms a film on the termite control area in a shorter time than conventional water-soluble emulsions, preventing the chemical solution from penetrating deep into the soil, and also acts as a base agent and curing agent. Based on this discovery, we discovered that it is possible to control the film formation time by adjusting the water content and the moisture content, so that it is possible to always form a film with the appropriate thickness to match the penetration rate due to differences in soil quality. As a result, the present invention was completed.

That is, the present invention provides a two-component contact emulsion containing an anti-termite compound by applying a two-component contact emulsion containing an anti-termite compound to wooden parts such as flooring and pillar materials of a house, or to soil under the floor of a house or in the surrounding area. Forms a film or treatment layer that prevents active ingredients from leaching out due to moisture, prevents applied active ingredients from being hydrolyzed or decomposed by soil microorganisms, and prevents volatilization of ingredients that are harmful to humans. This article relates to a termite control method that improves worker safety and resident safety.

In the present invention, the composition of the two-component contact emulsion is an epoxy resin emulsion as the main ingredient (solid content 50 to 60%).
%) to 100 parts, a curing agent type emulsion (solid content 60 to 80%) is preferably 20 to 100 parts, and as an epoxy resin emulsion, glycidyl type (bisphenol type, novolac type, alkylphenol type, resorcinol type, polyglycol type) type, ester type in which the hydrogen of the carboxyl group is substituted with a glycidyl group) and non-glycidyl type (cycloaliphatic type 1 boxite, epoxidized polybutadiene, evo-4-silicate glycidyl group), but preferably the glycidyl type. Good.Also, the curing agent type emulsion is modified polyamide type or modified aliphatic type.

Amine addition agents, acids, acid anhydrides, alcohols can be used, preferably modified polyamides are used.
<tit variant L II type 117i group is preferable. O to 100 parts of water may be added to 100 parts of each of the epoxy resin emulsion (solid content 50 to 60%) and curing agent type emulsion (solid content 60 to 80%) as the main ingredients. Also, for 100 parts of the base agent,
By adding 5 to 20 parts of a polyvinyl alcohol aqueous solution (solid content 10 to 20%) to the main agent or hardening agent, a more adhesive and stronger film can be formed.

The anti-termite compounds added to the two-component contact emulsion include, for example, chlorpyrifos, chlorpyrifos-methyl, pyridafention, phoxim, and other anti-termite compounds such as tripropylisocyanurate, which have relatively stable anti-termite properties in soil. The compound can be used as appropriate and can be contained in either the base agent or the curing agent, but it is preferably contained in the base agent. The mixing ratio of the anti-termite compound is the base agent, curing agent, polyvinyl alcohol added if necessary,
For example, 05 to 5 parts for chlorpyrifos, chlorpyrifos methyl, phoxim, and pyridafenthione, and 05 to 1 part for 1-lipropylisocyanurate to 100 parts of water combined.

The two-component contact emulsion containing the anti-termite compound of the present invention is produced by introducing the base agent and the curing agent from separate tanks using a device such as a double-headed spray gun that sprays two components separately.
Spray, spray or mix for use.
It is also possible to form a film by contacting it, or by mixing the base agent and curing agent in advance and applying them within the pot life.
It can also be formed into a film. The processing method and hanging are 1T from the top of the foundation, flint foundation, large pull, joist hanging, floor bundle, and foundation.
Spray or apply about 300 ml per ml to the entire surface of pillars, studs, braces, window sills, sidings, etc. within rL, and in contact with the soil under the floor or the soil around the house where termites can easily invade. The amount of 1 to 29 mg per ml of the surface of the soil 11 can be sprayed on the inside and outside of the foundation, around pile stones, around the foundation of a fence, etc. using a sprayer, jiyoru, etc., or injected under pressure using a pressure injector. In addition, 1 to 5 layers per ml can be sprayed or pressurized into the soil in important treatment areas with high moisture content, such as bathrooms, kitchens, washrooms, and toilets, using a sprayer, jiyoru, or pressurized injector. .

[Effects of the Invention] The present invention can prevent termites by applying a two-component contact type chemical compound containing an anti-termite compound to wooden parts such as flooring materials and pillar materials of a house, or to the soil under the floor of a house or in the surrounding area. A coating or treatment layer containing ant ingredients is formed, which prevents the active ingredients from leaching out due to moisture, prevents the applied active ingredients from being hydrolyzed or decomposed by soil microorganisms, and further prevents human This is a termite control method that greatly contributes to ensuring the safety of work and residents by preventing the volatilization of harmful components.

Termite control agents Δ, B, and C having the compositions shown in Table 1 were prepared. For A and B, a double-headed spray gun was used so that the base agent and curing agent came into contact at the application site, and for C, a single-headed spray gun was used to spray 1 ml/5 glass plates each.
cri, veneer (f22 ml/5 cri l
Sprayed at this rate. Leave this glass plate at room temperature,
After tilting the container at an angle of 45°, the time taken until the fluidity disappeared and the liquid stopped dripping was determined and shown in Table 2. The time required for complete film formation is also shown.

Table 1 Table 2 As is clear from Table 2, the termiticide B forms a film more rapidly than C, and furthermore, by adding water to the termite control agent, it is easier to form a film than with B. Time can be delayed and μ controlled.

Termite control agent A (active ingredient: 1%) in Example 1 and Termite control agent A glue in Example 1 ``Lupyrifos 1,
4,000 parts were replaced with 14 parts by weight of small A-shim and 23 parts by weight of pyridafenthione, and 19.
%) was used to conduct an effectiveness test against termites. First, use a spatula to cover the entire surface of the sapwood of a red pine measuring 3 x 3 x 5 cm.
It was applied to 5 sapwoods at a rate of 30M6'C'7i and left to dry for 240 minutes. , 1Φ1 after drying, 30 (
] Flatten and tighten the non-turtle sand and add 10 d of ion-exchanged water.
2 in a petri dish with crystals, 9cm in diameter and 5c1 in diameter.
I put 214 on all sides. In this petri dish, put 1 test insect (actual number of 100 individuals) of Renii ground ants at 28°C (
The insects were reared for 11 months at a humidity of 75 ± 5 T'', and the mortality rate and degree of feeding damage were investigated. Moderate feeding damage (+): There are food marks of less than 1 foot in depth in several places on the wood piece. Similar tests were conducted on sapwood treated with the oil agent in the same manner and on sapwood not treated with any termite control agent.The results are shown in Table 3.

Table 3 JLL Termite control agent A obtained in Example 1 was subjected to a soil migration test to examine the outflow of chlorpyrifos from the soil treated product.

First, fill a vinyl chloride pipe with an inner diameter of 10 cIR and a height of 20 cir with sand, and apply 1 j of pest control agent A from above the vinyl chloride pipe.
/TrL2 using a pipette. 24 hours later, precipitation @ 500. After leaving it for another 24 hours, sand was scraped off from the top of the PVC pipe to the bottom, and spread in a Petri dish with a diameter of 91 cm.
I put my head in. Place these Shirere in a container with water at the bottom, and place the container in a thermostatic seedling at a temperature of 28 ± 2℃ for 14 days.
The specimens were allowed to stand for several days, and the mortality rate was investigated. As a control, a 40-fold dilution of chlorpyrifos 40% emulsion was prepared at 1. A fl/m2 spray treatment area and a distilled water 11/m2@fabric treatment area were established. The results are shown in Table 4.

Table 4 (The numbers are mortality rate (X)) As is clear from Table 4, in the chlorpyrifos emulsion treatment area, chlorpyrifos was transferred along with the permeate water, whereas in the case of pesticide A
In the treated area, there was no movement of chlorpyrifos, and there was no concern that the components of the applied chemicals would flow into groundwater or cause environmental pollution.

Claims (1)

[Claims] A termite control method comprising forming a film on a termite control area by contacting and applying an epoxy resin emulsion containing a termite control agent and a curing agent.