JPH0530102U - Ant-proof granule - Google Patents

Abstract

(57) [Summary] [Purpose] To manufacture ant-preventive granules to be sprayed around structures and cables to protect them from damage by termites. [Structure] Heat-resistant diethyltoluamide was added to synthetic resin in an amount of 0.
Kneading is performed in an amount of 01 to 30% by weight to prepare an anti-termite granule. The particle size is 0.5 to 5 mm. In addition, an additive is added so that the specific gravity becomes 1 or more to prevent scattering. Further, diethyltoluamide may be microencapsulated. [Effect] Since heat resistant diethyltoluamide is used, it does not decompose during molding and the anticidal effect does not decrease. Easy to manufacture and easy to apply anywhere. The granules do not leave any space between them and a uniform anti-termite effect can be obtained, and especially when microcapsules are used, the termite-proof effect can be maintained for a long period of time.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an antitermite granule that has an insecticidal effect on termites and is highly safe.

[0002]

[Prior Art]

 Due to the habit of termites, which eat cellulose, to bite all obstacles within their range of motion, not only wooden structures but also plastic-coated cables such as PVC and polyethylene will also cause damage. It suffers social damage such as cable insulation breakdown and communication interruption. Among such termites, the termites inhabit in areas where the average temperature of one month is 4 ° C or higher, and the termites inhabit all over Japan, and the damage of the termites is particularly serious.

As a conventional anti-term control measure, a drin-based drug, which has a stable and excellent effect for a long period of time, has been used, but it may be accumulated in a biological system and is difficult to understand. There was a problem of environmental pollution.

[0004]

[Issues to be solved by the device]

 Therefore, although organic phosphorus chemicals are used, in addition to safety issues, many of them decompose during plastic processing, for example, at a processing temperature of around 200 ° C, which causes odor during production. In addition, the anti-termite effect has decreased. In addition, even after installation, it was difficult to maintain the termite prevention effect by deteriorating due to the environment such as water and light.

In order to solve the above-mentioned drawbacks, the present invention uses a heat-resistant diethyltoluamide that is highly safe and does not decompose even when heated during processing. It is intended to provide an anti-termite granule.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, the termite control granule of the present invention is a granule containing a synthetic resin containing diethyltoluamide, and the content of diethyltoluamide is 0.01 to 30 weight percent. It is a thing. Further, diethyltoluamide may be microencapsulated.

Hereinafter, the termite control agent of the present invention will be described. The synthetic resin that constitutes the ant-preventive granules is soft polyvinyl chloride, polyethylene, ethylene-ethylene acrylate copolymer, ethylene-methacrylate copolymer, ethylene-vinyl acetate copolymer, polyethylene terephthalate, polystyrene terephthalate. Any synthetic resin may be applied regardless of plastics or rubbers such as polybutadiene terephthalate, ethylene / propylene rubber, chloroprene rubber, and chlorosulfonated polyethylene rubber. Diethyl toluamide kneaded with these synthetic resins has the structure shown below,

[0008]

[Chemical 1]

It has an insecticidal effect against termites and is highly safe for the human body. Furthermore, it is heat-stable and does not decompose thermally when it is kneaded with a synthetic resin and formed into granules, for example, even when heated to 200 ° C. Although diethyltoluamide may be directly mixed with the synthetic resin, it may be mixed in a microcapsule so as to have a sustained release property. Microcapsules of diethyltoluamide can be formed by forming a porous solid microcapsule wall, for example, into a porous capsule by an interfacial reaction method based on silicon oxide, or by forming a melamine wall microcapsule wall material. It can be carried out by a usual method such as adding diethyltoluamide to the above and then gradually reducing the pressure and then returning to normal pressure for microcapsulation. The sustained release property of diethyltoluamide can be adjusted and controlled by adjusting the amount of the wall material substance of the microcapsules. The amount of the encapsulated diethyltoluamide in the microcapsules is preferably 30% by weight or more. If the primary average particle diameter of the microcapsules is too small, the particles tend to aggregate, and if it is too large, the mechanical strength and cold resistance of the added material tend to decrease, so 1-50 μm is preferred.

It is preferable that diethyltoluamide is substantially contained in the synthetic resin in an amount of 0.01 to 10% by weight both in the case of directly kneading the synthetic resin and in the case of microencapsulation. When the content of diethyltoluamide is 0.01% by weight or less, the termite-proof effect is poor, and when it is 10% by weight or more, the processing stability and cold resistance of the material are deteriorated, which is not preferable.

Further, it is preferable to add a filler such as an inorganic filler to the synthetic resin containing diethyltoluamide as described above so that the specific gravity becomes 1 or more. When the specific gravity is 1 or more, it is difficult for water to flow out when sprayed, and it is less likely to be scattered by wind. In addition, various additives such as an antiaging agent, a coloring agent, and a flame retardant may be added according to the purpose of use.

Granules are produced from such a granule molding material. The shape of the granule may be either spherical or angular, and the size is in the range of 0.5 to 5 mm diameter (or corner). 0. If it is 5 mm or less, it is difficult to process, which leads to cost increase. If it is 5 mm or more, the concentration tends to vary when sprayed. Occurs. Therefore, the granule diameter is preferably 1 to 3 mm.

Further, such a granule molding material can be formed into a porous foam by a conventional method. Since the surface area of the granules is large when a porous foam is used, it is possible to obtain a greater anti-termite effect with a small amount of spray. In this case, it is necessary to consider the foaming ratio so that the bulk specific gravity does not become 1 or less. [Examples 1 to 4] A 2 mm ² conductor was provided with a 0.8 mm thick cross-linked polyethylene insulator, and both ends of a 30 mm long power cable having a sheath on the outside thereof were molded with Epokin resin. It was created. Before the power cable was energized, heat cycled at 100 ° C for 5 days, weathered for 500 hours, and weathered at 70 ° C for 5 days (specimen 1). As shown in FIG. 1, each is placed in a petri dish 2 together with Kuromatsu shavings 3, and 20 g of diethyltoluamide 4 or microcapsulated 4 is sprinkled around each of them, and 50 termite worker ants are put into the petri dish. The test was conducted at ± 2 ° C for 2-3 weeks. The results of the evaluations shown in Table 2 are shown in Table 1. Similarly, as Comparative Examples 1 to 5, granules having a low content of diethyltoluamide, a large diameter of termite-preventing granules, those not containing diethyltoluamide, and granules containing other termite controlling agents were prepared. Was tested. The results are shown in Table 1.

[0014]

[Table 1]

[0015]

[Table 2]

[0016]

[Effect of the device]

 As is clear from the above description, the termite-preventing granules of the present invention contain the heat-resistant diethyl ether amide and are therefore stable against heating during molding into granules. Therefore, the ant-preventing effect does not decrease even after heating. In addition, it is weather resistant and can be sprayed at any place, and easily and with excellent anti-termite effect can be obtained. Furthermore, by encapsulating diethyltoluamide in microcapsules, the termite-preventing effect can be maintained for a long period of time, which is extremely effective.

Addition of an additive to this granule to have a specific gravity of 1 or more and spraying it around a house or a building or around a cable laid on the ground can protect from termite feeding damage without scattering. You can Such an anti-termite granule can be easily applied to any place and any size cable.

[Brief description of drawings]

FIG. 1 is a view showing a test of the termite-proof cable of the present invention.

Claims (2)

[Scope of utility model registration request] 1. A granule containing a synthetic resin containing diethyltoluamide, wherein the content of diethyltoluamide is 0.0.
An antitermite granule characterized by being 1 to 30% by weight. 2. The termite control agent according to claim 1, wherein the diethyltoluamide is microencapsulated.