JPS6117502A - Termite-shielding composition - Google Patents

Abstract

PURPOSE:A termite-shielding composition that contains, as a major active ingredient, octachlorodipropyl ether and when needed, an insecticide as an auxiliaty agent, thus showing high shielding effect against termites even in a small amount with high duration, when used as a solution preparation. CONSTITUTION:The objective composition contains, as a major ingredient, octachlorodipropyl ether of the formula and, when necessary, an insecticide such as phoxime as an auxiliary. The amount of the ostachlorodipropyl ether is more than 1pt. per 1pt. of the insecticide. The compound of the fomula has been used as an intensifier of insecticides, but has been found, by the inventor, to have a specific repellent effect against termites. The composition is converted into a variety of preparations such as solution, enmulsion, dust, granules or the like or further added to materials of a synthetic resin such as vinyl chloride, vinylidene chloride, acrylic resin or alkyd resin to geive a formed material, a coating or adhesive for film forming.

Description

DETAILED DESCRIPTION OF THE INVENTION [1] (Field of Industrial Application) The present invention relates to a termite-preventing composition that exhibits effective insect- and termite-proofing functions, particularly against termites.

[2] (Prior Art) Chlordane has conventionally been the most commonly used termite control agent.

[3] (Problems to be Solved by the Invention) Conventionally, insecticidal termite control agents such as chlordane have been widely used due to their strong insecticidal properties and stability (residual effectiveness) in nature. However, because they persist in the natural world, environmental pollution has become a problem. Therefore, for example, pyrethroid insecticides (pyrethrin, allethrin, etc.), organophosphorus insecticides (diazinon, fenthion, etc.), or carbamate insecticides (carbaryl insecticides, etc.) are being considered as alternatives, but all of them are sufficient to control termites. The current situation is that it cannot be effective.

Conventionally, octachlorodipropyl ether is known to have some insecticidal efficacy, but its efficacy is not long-lasting, and it has been mainly used as an efficacy enhancer for insecticides, but it has a specific effect on termites. This invention was made based on the new finding that it exhibits a repellent effect.

[4] (Means for solving the problem) The present invention provides octachlorodipropyl ether (chemical formula i CCJ, l
::HClICH,OCH,CHC/-Chen, specific gravity; 4
~150'C/4. This is an anti-termite composition containing Hg as a main component.

Further, other termite-prevention compositions according to the present invention contain various insecticide components as subcomponents in addition to octachlorodipropyl ether as a main component.

Any of the above anti-termite compositions can be configured in the form of an oil solution, emulsion, wettable powder, powder, granule, solubilizer, aerosol, or other forms.

The termite-preventing composition according to the present invention can also be applied by being blended into synthetic resin materials such as vinyl chloride, vinylidene chloride, acrylic resins, and alkyd resins, or by blending with adhesives or paints.

[5] (Example 1) A common surfactant was blended with xylene, which is a petroleum solvent, and octachlorodipropyl ether was mixed therein at a concentration of 70% by weight to obtain emulsion a.

(Example 2) Similarly, a normal surfactant was blended with xylene, and octachlorodipropyl ether was added at a concentration of 20% by weight.
and Phoxime were mixed in at a concentration of 20% by weight to obtain an emulsion.

Next, emulsions a and b in Examples 1 and 2 were tested for their insect repellent effects against termites. Similarly, xylene was mixed with a normal surfactant, chlordane was mixed therein to give a concentration of 40% by weight, and emulsion C was prepared, and phoxim was added to a concentration of 50% by weight. This was mixed to form emulsion d.

In the test, each of these emulsions awd was diluted as a sample as shown in Table 1 below, and a piece of wood (2X 2 After air drying, each was used as a test piece.

Table 1 Next, three of each of these test pieces were placed in the same Yamato termite nest box, and the rate of weight loss due to feeding damage and the condition of the ant trail after two weeks were observed. The observation results are shown in Table 2 below.

Table 2 In addition, in Table 2 above, the degree of harm shown from 0 to V is the degree of the number of ant tracks that occurred, ranging from 0 (no number of ant tracks) to significant number of ant tracks (V). shows. In addition, the specimens marked with * are untreated wood pieces.

The observation results in Table 2 above indicate that the test pieces made from any of the samples in a w d have a certain insect repellent effect against termites, but the comparison was made using the diluted solutions containing the same concentration of components. In this case, it can be confirmed that sample a according to the present invention has a superior termite insect repellent effect to sample C containing chlordane, and is equivalent to sample d containing phoxim, an organophosphorus insecticide. It is found that it has a termite insect repellent effect. In addition, the test sample of the termite-preventing composition according to the present invention containing phoxim as a subcomponent had extremely excellent termite-controlling properties, and it was confirmed that the composition had an almost complete insect-controlling effect. Incidentally, the weight reduction rate in Table 2 above indicates the degree of damage as a specific numerical value, and all of them coincide with the degree of damage.

(Example 4) A vinyl chloride sheet e1 formed by blending 1% by weight of octachlorodipropyl ether, a vinyl chloride sheet f1 formed by blending 3% by weight, and a vinyl chloride sheet g formed by blending 5% by weight were obtained, respectively. Ta.

These vinyl chloride sheets e, f, and g were used as specimens, and each was 3 X 3 X O, 2 (c+++)
A test piece was formed to the size of . Five test pieces each were placed in the same Yamato termite nest box, and the degree of damage was observed one month later. The observation results are shown in Table 6 below.

Table 3: Note that the asterisk (*) indicates a non-blended vinyl chloride sheet, and the symbols indicating the degree of damage are the same as in Table 2 above.

The observation results in Table 3 above indicate that the composition of the termite-preventing composition of the present invention in synthetic resin materials exhibits effective insect repellent and termite-proofing effects against termites. It is certain that when the amount of octachlorodipropyl ether blended is 3% by weight or more, as in g, it exhibits a particularly excellent insect repellent effect against termites.

From this, it can be concluded that the amount of octachlorodipropyl ether to be contained or blended in the antitermite composition according to the present invention is preferably 3% by weight or more.

Furthermore, the termite-proofing effect in Example 4 was the same even when the termite-proofing composition according to the present invention was incorporated into an adhesive or a paint.

In addition, in the termite control composition according to the present invention, the ratio of the main component to the subcomponent to be contained is 1 part by weight or more of octachlorodipropyl ether to 1 part by weight of the insecticide. It is preferable in terms of insect repellent effect and sustainability of the insect repellent effect.

[6] (Effect of the invention) As described above, all of the termite-preventing compositions according to the present invention exhibit excellent termite-repelling effects compared to the conventional examples in a small amount, and have a long-lasting effect. It can be used in a variety of ways, including liquids such as oils and emulsions, powders, granules, or solids, as well as forming materials such as synthetic resin materials and film forming materials such as paints.

Claims (3)

[Claims] (1) An anti-termite composition containing octachlorodipropyl ether as a main component. (2) Main component is octachlorodipropyl ether,
An anti-termite composition further containing an insecticide as an auxiliary ingredient. (3) The termite control composition according to claim 2, wherein the insecticide is phoxim.