JPS6191101A - Controlling material against insect pest and method therefor - Google Patents

Abstract

PURPOSE:A controlling material against insect pests capable of preventing itself from being washed away by rainwater, etc., having prolonged effects, obtained by blending at least one of an isocyanate component and a polyol component of urethane polymer with a controller for insect pests and fine granules to give two solutions and mixing the solutions when the material is used. CONSTITUTION:A controlling material comprising two solutions obtained by blending one or both of an isocyanate component (e.g., reaction product of trimethylolpropane and xylene diisocyanate) and a polyol component (e.g., reaction product of diethylene glycol, glycerin, and adipic acid of urethane prepolymer with a controller for insect pests (preferably combination of controller such as chlordene, etc., having contact poisonous action and prolonged effects and controller such as phoxim, etc., having immediate effects) and fine granules (preferably aluminum hydroxide). The two solutions are mixed when the material is used and cured to give a cured material of urethane polymer. Since the material is a cured material, the controller will not be evaporated and the solutions are easily mixed at normal temperature.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention is applicable to concrete foundations such as under floors of homes and buildings, wood foundations, soil around them, and other termites.
The present invention relates to a control material and a control method for controlling feeding damage caused by house ants, wasps, and other pests over a long period of time by coating or spraying them on the entry routes of these pests.

(Prior art) Conventional countermeasures against termite damage to houses, etc. are by spraying a large amount (approximately 100 Vrn') of an emulsion, granule, or irrigation agent of a termite control agent such as chlordane on the soil under the floor. It was being processed.

Furthermore, in recent years, wood that has been pre-impregnated with a termite control agent and has been treated to prevent damage from being eaten by termites is being used when constructing houses.

In addition, a method has recently been proposed in which a plastic film made of vinyl chloride, polyethylene, polyvinyl acetate, etc. mixed with a termite control agent is used and the plastic film is attached to the entire surface of the underfloor and the concrete and wood parts of the foundation.

Furthermore, as a termite control means for communication cables, etc., in Japanese Patent Application Laid-Open No. 55-85501, a termite control agent is mixed with foamable urethane resin, and this is filled into any gaps in the cables and the like. A foaming agent is disclosed.

(Problems to be Solved by the Present Invention) By the way, when the termite control agent is sprayed in the form of an emulsion as described above, it is necessary to ``It is necessary to use a pesticide with a much higher concentration than that required to actually control termites, but when doing so, it is extremely dangerous if workers inhale the chemical solution during construction. Moreover, there is a problem in that the termite control agent permeates into the ground through rainwater and the like and mixes with groundwater, causing pollution such as contaminating well water. For this reason, only low-concentration substances can be used these days, and in the case of chlorde/6f1 or higher, they are now treated as deleterious substances. Therefore, at this low concentration, there is a problem that the effect is not long-lasting.

In addition, wood that has been treated for corrosion damage is expensive because it cannot be cleaned efficiently, and the reality is that it is used only for the foundations of buildings, and other parts are used to suffering from damage. The long-term sustainability of the effect also depends on the amount of tatami.

In addition, the method of using a plastic film is extremely expensive because it requires very high pressure composite fibers and is troublesome to install.Furthermore, the plastic film may have pinholes even if it is only a few, and ill P! If there are any places with t, l, etc., there is a risk that termites will enter the house by creating an ant trail, and there is a problem of lack of reliability.

Furthermore, the method of mixing with foamable urethane resin has the same disadvantages when applied to houses.

■ Termite damage is mainly caused by humid areas such as kitchens, washrooms, and bathrooms, but foamable urethane resin is mainly made up of open cells, and moisture infiltrates into the open cells, making it not moisture-proof.

■ There is a habit of forming an ant trail through all the pores of the open cell material.

■ Foaming Creta/Resin, regardless of whether it is an open cell or closed cell, generates heat when it foams, and the chemical decomposes and evaporates at that time.

■ Drugs are easily released through the pores of open-celled cells, which have a large surface area, and conversely, drugs are trapped within the pores of closed-celled cells, making it difficult to control drug release and slow release. I'm good at being liberated.

■ Urethane foam has a habit of yellowing and deteriorating over a long period of time, becoming brittle, turning into powder, and falling off, resulting in poor durability.

(Means for Solving the Problems) In order to solve all of the above-mentioned problems, the present invention aims to solve all of the above-mentioned problems by combining at least one of the isocyanate component and the polyol component, which are urethane prepolymers, with an insect pest control agent and microparticles. The two liquids are mixed at the time of construction, and applied to the foundations of buildings and the surrounding soil and other pest entry routes (by coating or spraying, etc.), and are cured to form a urethane polymer. It is made into a cured product.

(Function) In this way, since the pest control agent is contained in the cured product of the urethane polymer, it will not be washed away by rainwater, etc. Therefore, the concentration of the pest control agent can be increased, and therefore the pest control agent is truly needed. A high pest control effect can be achieved just by applying it in a small area.

In addition, due to the mixing of microscopic particles, the gaps between the countless microscopic particles are filled with the urethane polymer mixed with the insect repellent, and the urethane polymer forms an island-like structure. The pest control agent does not remain completely trapped in the polymer and is gradually released.
Further, sustained release can be controlled by adjusting the amount of microparticles.

(Example) Below, the pest control material according to the present invention will be explained based on an example.

This pest control product is made up of two liquids in which one or both of the isocyanate component, which is a urethane prepolymer, and the polyol component are mixed with a pest control agent and fine particles, and these two liquids are used during construction. The urethane prepolymer is completely mixed and cured to form a cured product of urethane polymer.The urethane prepolymer does not contain a solvent and can be cured at room temperature, so there is no volatilization of the pest control agent. It can be used industrially to advantage because it can be easily mixed at ambient temperatures. Examples of the pest control agents include chlortin, dieldrin, aldrin, and permethrin.
It is preferable to use a combination of a long-acting agent with a residual effect and an immediate-acting agent such as Hokimu, Chlorbilifos, etc., and each of these pest control agents should be added in an amount of 0.5 to 6 on the cured product of the urethane polymer. They are mixed at a moderate weight ratio. In addition, the pest control agent may be either a residual-acting agent or an immediate-acting agent. In addition, insect pest control agents such as ff [classes include pyrethroid insecticides, phosphorus insecticides, carbamate insecticides, etc.], and repellents such as diethyl metatroamide can also be used. Persist.

In addition, alkaline particles decompose pest control agents, so neutral particles such as aluminum hydroxide (A/(OH)) are preferable as fine particles, but alkaline particles such as titanium-based, titanium-based, etc. It is also possible to use inorganic fine particles such as magnesium carbonate (MgCO2), calcium silicate, silica, talc, cane earth, etc., or acidic acid clay, which have been surface-treated with a silane coupling agent, etc. The granules form a sustained release pathway and allow controlled release, and also act as a thickening agent and viscosity modifier. It is mixed with ti, which has a weight ratio of 60 to 80%, preferably 50 to 70%.

Further, the fine particles are preferably a combination of large particles having a particle size of about 50-150μ and small particles having a diameter of about 5-10μ. As a result, small W particles are appropriately scattered between large micro particles, and the gaps are filled with urethane polymer mixed with pest control agent. A channel for the urethane polymer that slowly releases the pest control agent that reaches the surface is formed, and trapping of the pest control agent in the urethane polymer and rapid release only from the surface area are reliably suppressed, and the release of the pest control agent is prevented. This means that controlled release properties can be further enhanced. In addition, the small micro-particles act as a roller over the large-diameter particles (because of this, it is possible to suppress the increase in viscosity, making it easier to adjust the viscosity during dispersion, and increasing the amount of micro-particles can be added.

As a specific example of the isocyanate component, for example, an isocyanate prepolymer prepared by reacting trimethylolpropa/(1 mol) and xylene diisocyanate (υ mol) with a molecular weight of 700 is suitable, and as a specific example of the polyol component, For example, it is a polyester polyol made by reacting diethylene glycol (α9 moles), glycerin (α3 moles), and adipic acid (1.0 moles), and has a molecular weight of 7.
00 is preferred.

Other isocyanate components include aromatic moxibustion inocyanates such as 2,4-toluylene diisocyanate, P-phenyl diisocyanate, 4,4'-diphenylmethane diisocyanate-11 triisocyanate, hexamethylene diisocyanate, lysine diisocyanate,
A trifunctional isocyanate prepolymer is formed by reacting an aliphatic isocyanate such as xylene diisocyanate with a polyol (ester type or ether type), and has a molecular weight of 500-3000. Preferably 700-20
It is recommended to use 00.

In addition, polyol components include diols such as ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, diethylene glycol, butylene glycol, and hexamethylene glycol, as well as glycerin, triethylene glycol, triethylene glycol, triethylene glycol, etc.
Polyester, which is a trifunctional polyol prepolymer, is produced by reacting a triol such as I7 methylolethane, 1,2,6-hexanetriol, or pentaerythritol with a dicarboxylic acid such as adipic acid, sepacic acid, maleic acid, or dimer acid. It is preferable to use a polyol having a molecular weight of 500-5000, preferably 700-2000.

In other words, by appropriately selecting from the above-mentioned isocyanate components and polyol components, it is possible to set the desired affinity between the isocyanate component, the polyol component, and the pest control agent, and it is easier to control the desired sustained release. It can be performed.

In addition, by appropriately selecting the molecular weight as described above, appropriate elongation and elasticity can be set so that the pest control material formed is difficult to break due to external force.

The pest control agent is mixed into either or both of the isocyanate component and the polyol component. In addition, if necessary, a catalyst such as tin-based di-n-butyltin dilaurate or amine-based triethylamine may be used at a concentration of 0.3 to 1.0%.
H) It is added to either or both of the incyanate component and the polyol component.

For construction traps, these isocyanate components and polyol components are mixed uniformly to prepare a pest control material. This prepared pest control material is in the form of a viscous liquid and can be cured naturally at room temperature in about 20 minutes at the earliest or in about 6 days at the latest, but is preferably cured in one house. Considering the construction time, it is suitable to harden in 3 to 6 hours. By means of prepared pest control agents, application, spraying, etc., it is possible to control the foundations and pillars of houses and other pest infestation routes, such as termites, house ants, and wasps, as appropriate. It is formed into a thick layer and cured as a cured product of urethane polymer.

(Experimental Example) In order to confirm that the pest control material of the present invention maintains its effect over a long period of time, the following accelerated test was conducted.

After placing a sample of the present invention in a petri dish with a diameter of 10 cm, 20 domestic termites were placed therein and brought into contact for each test period using a conventional method.

The samples were obtained by mixing an isocyanate component, which is a urethane prepolymer, a polyol component, a catalyst, a pest control agent, and fine particles in the composition ratio shown in Table 1, and curing the mixture at room temperature. The polyol component is a modified polyether/polyester polyol (molecule [700)], the isocyanate component is a trifunctional isocyanate made from the reaction of xylene diisocyanate and trimethylpropane, the pest control agent is phoxim and chlortin, and the microparticles are water. Aluminum oxide rCL-375J (manufactured by Sumitomo Aluminum Smelting Co., Ltd.) was used in each case.

The first test was carried out using the prepared sample as is/without any treatment, and the second test was carried out by irradiating the sample with ultraviolet rays at 40°C for 48 hours on both sides, and then air-drying it at room temperature for 48 hours. In the 6th test, the sample was immersed in running water for 1 hour and then heated and dried at 60°C for 23 hours, 10 times!
The test was carried out using 3 pieces that had been turned over. The results of the first exam @
Table 2 shows the results of the second test. Table 3 shows the results of the third test? Fourth
Each is shown in the table.

Looking at all the results in Tables 2 to 4, both trials 1 to 3 show an effective insecticidal effect. In addition, the insecticidal effect was improved in accelerated tests using weathering and heating operations. In addition, in Sample 3.4.5 of Table 1 above, only the polyol component and Incyane-1 component were added at 10αg): 1
When the composition was changed to the same ratio of 0α7), the same results as above were obtained. Therefore, these results show that the pest control material according to the present invention exhibits a pest control effect over a long period of time.

(Effect of the invention)

Claims (2)

[Claims] (1) Consists of an isocyanate component that is a urethane prepolymer, a polyol component, an insect control agent, and fine particles, and the pest control agent and the fine particles are mixed into at least one of the isocyanate component and the polyol component. A pest control material characterized by: (2) Mix two liquids consisting of at least one of the isocyanate component, which is a urethane prepolymer, and the polyol component, mixed with a pest control agent and microparticles, and apply or spray this mixture to the pest entry route. A pest control method characterized by curing to obtain a cured product of urethane polymer.