JPH0748530A - Pest-repellent coating composition - Google Patents

Abstract

PURPOSE:To provide the composition which can protect substrates including electrical wires and cables for a long time from being damaged by various pests and is highly safe and economical. CONSTITUTION:A terpenoid compound and capsaicin each in amount of preferably 0.05-30wt.% based on the total solids content are added to, e. g. an acrylic coating composition, and the obtained mixture is uniformly mixed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pest repellent paint useful for protecting electric wires and cables from pests such as mice and termites.

[0002]

2. Description of the Related Art In recent years, due to the diversification of operating environments,
In various electrical equipment such as cables,
Damage from various pests such as termites, birds, ship eating insects, and molds is increasing. Among them, the increase of food damage caused by mice is remarkable, and it becomes a big social problem in combination with the environmental changes such as the increase of electric power demand, the spread of various office automation equipment, the change of architectural style, the automation of various equipment, and the unmanned operation. There is. That is, for example, electric wires / cables are cut or damaged by a mouse, which causes serious problems such as power failure, communication interruption, and electrical equipment stoppage or abnormal operation due to electric leakage or abnormal current.

Conventionally, in order to prevent damage of this type, a so-called mouse-proof cable in which a sheath material is mixed with a repellent is used, and a tape containing the repellent is wound around the surface or a repellent is contained. Applying a paint that does. Above all, paints containing repellents are generally used for existing electric wires and cables from the viewpoint of workability and economy.

[0004]

However, the conventional paint has the following problems because cycloheximide is generally used as a repellent. In other words, cycloheximide is a taste repellent, and since it produces a repellent effect once it is bitten, it must be a "test wound".
There was a problem that it could be. In addition, cycloheximide is a deleterious substance and has a problem in safety, and it is thermally unstable, so that there is a possibility that the original effect may not be obtained by heat during use or during production. Further, there is a problem that it is expensive.

On the other hand, there are odor repellents such as terpenoid compounds that exert an repellant effect by acting on the odor of animals, and there is no fear of "test scratches" as in the case of taste repellents. Has been attracting attention. However, because odor repellents are volatile in nature, it is difficult for many of them to maintain their effects for a long period of time, and in addition, there are individual differences in the odor of animals, and in some cases, repellent effects are sufficiently exerted. There was a risk that it would not be done.

The present invention has been made in view of such conventional circumstances, and provides a safe and inexpensive repellent which has an excellent pest repellent effect without the above-mentioned drawbacks. An object of the present invention is to provide a pest repellent paint that can protect electric wires, cables, and other objects to be coated from damage by various pests.

[0007]

The pest repellent paint of the present invention is characterized by containing (a) a terpenoid compound and (b) capsaicin.

The pest repellent paint of the present invention can be used as a pest repellent component (a) terpenoid in a usual paint using an organic solvent or water as a diluent, for example, various acrylic, polyurethane and epoxy paints. A compound, (b)
It is a mixture with capsaicin.

The terpenoid compound as the component (a) is a terpenoid compound monomer contained in plant essential oils or resin gums obtained by steam distillation of various parts of plants and its low polymer, such as mice, cats and snakes. It acts on the olfaction and avoids it, and it also occurs against mold and the like.
Has the effect of inhibiting growth. Such terpenoid compounds, beta-myrcene (C ₁₀ H _16), alloocimene (C ₁₀ H _16), Citra - Le (C ₁₀ H ₁₆ O), Linaro - Le (C ₁₀ H ₁₆ O), limonene ( C ₁₀ H ₁₆ ), dipentene (C ₁₀ H ₁₆ ), terpinene (C ₁₀ H ₁₆ ), terpineol (C ₁₀ H ₁₈ O), anethole (C ₁₀ H ₁₂ O), pinene (C ₁₀ H _16). ), Nopole (C ₁₁ H ₁₉ O), camphene (C ₁₀ H ₁₆ ), nopyr acetate (C ₁₃ H ₂₁ O ₂ ), isobornyl acetate (C ₁₂ H ₂₀ O ₂ ) and other monomers , And low-polymerized products or low-polymerized products of these dimers to 7-mer products having an average molecular weight of 1,000 or less. These terpenoid compounds are essentially plant fragrances, essential oil components and are therefore harmless to humans and animals with no effect on the natural cycle.

The component (b), capsaicin, is a pungency component present in the skin of capsicum and has the effect of acting on the taste of harmful animals such as rats, cats and snakes and repelling them. Due to its high physical and chemical stability, the repellent effect is maintained for a long period of time, and the effect is not lost due to heat during production or use.
In addition, it is originally used as a spice, and therefore has excellent safety.

In the present invention, the terpenoid compound as the component (a) and the capsaicin as the component (b) are preferably blended in an amount of 0.05 to 30 wt% of the total solid content of the coating composition. If the blending amount of each component is too small, the repellent effect becomes insufficient, and conversely, if the blending amount is too large, the coating film strength, the coating workability of the paint, and the like decrease.

In the present invention, the above-mentioned terpenoid compound or capsaicin is not blended in the paint as it is, so that the handling is facilitated, the dispersibility is improved, and the repellent effect is maintained for a longer period of time. The microcapsule may be used. As the wall material of the microcapsule, various known organic and inorganic materials can be used. Specifically, examples of organic resins include amino resins, melamine resins, and urea resins. Inorganic compounds include alkaline earth metal carbonates (calcium carbonate, barium carbonate, magnesium carbonate, etc.), alkaline earth metal silicates (calcium silicate, barium silicate, magnesium silicate, etc.), metal oxides (silica, oxidation). Cobalt, nickel oxide, etc.), metal carbonates (cobalt carbonate, nickel carbonate, basic carbonic acid, etc.), metals (cobalt, nickel, copper, etc.) and the like. The content of each active ingredient in the microcapsules is preferably about 30 wt% or more, and the particle size is 0.5
Approximately 150 μm is appropriate. Further, the surface of the microcapsules is preferably surface-treated with a fatty acid or the like in order to enhance dispersibility.

When the terpenoid compound or capsaicin is used in the form of microcapsules as described above, a retention agent can be added in order to enhance the persistence of the repellent effect of these active ingredients. As the retaining agent, polyhydric alcohols (glycerin, propylene alcohol, sorbitol, polyethylene glycol, etc.), sugars (sucrose,
Lactose, glucose, etc.), diethyl phthalate, benzyl benzoate, etc. are exemplified.

The coating composition of the present invention may contain a flame retardant for imparting flame retardancy. Examples of the flame retardant include halogen-based, phosphorus-based, and inorganic flame-retardants such as aluminum hydroxide and magnesium hydroxide. These may be used alone or in combination of two or more. You may use it. A paint prepared to have an oxygen index of 27 or more by blending such a flame retardant is useful as a paint for electric wires and cables.

[0015]

The pest repellent paint of the present invention contains (a) a terpenoid compound and (b) capsaicin, which are particularly selected from odor repellents and taste repellents. The repellent effect is effectively added,
Excellent repellent effect. In other words, there is no "trial wound", there is no variation in the effects due to individual differences, and such effects persist for a long time, and almost all pests and other pests are avoided for a long time. be able to. Moreover, the terpenoid compound (a) and the capsaicin (b) are both natural aroma components or pungency components, have excellent safety, are thermally stable, and are inexpensive. Therefore, it can be applied to the surface of electric wires, cables, various electrical equipment, and structures such as houses, and can protect them safely and reliably for a long period of time from the eating damage of rats, etc. Is also excellent.

[0016]

EXAMPLES Next, examples of the present invention will be described. Examples 1 to 5 As shown in Table 1, a terpenoid compound (alloocimene oligomer) and capsaicin were added to an acrylic aqueous emulsion and uniformly mixed to obtain a pest repellent paint.

Examples 6 and 7 As shown in Table 1, microcapsules containing terpenoid compound (alloocimene monomer) in an acrylic aqueous emulsion (30 parts by weight of terpenoid compound and silica-based porous microcapsules (particles under reduced pressure) (5 μm in diameter, 100 μm in surface pore size) mixed with 70 parts by weight, and then returned to normal pressure), and 32% by weight capsaicin in amino resin microcapsules containing 32% by weight, and mixed evenly to produce a pest. I got a repellent paint.

Examples 8 and 9 In the case of Examples 6 and 7, further flame retardant ammonium polyphosphate or aluminum hydroxide in the amounts shown in Table 1 was added and mixed to obtain a flame retardant pest repellent paint. It was

Next, each of the obtained coating materials was applied to 600V class 3-core CV
It was applied to each cable (conductor cross-sectional area 5.5 mm ² ), dried and solidified to form a coating film with a thickness of 150 μm, and the obtained cable was subjected to the following rat repellent test. Cut out a 10 cm long sample cable from the cable and put it together with water and food into a black rat cage (38 cm × 25 cm × 20 c).
m) and left for 1 week to observe the degree of bite. An untreated cable was placed in the cage as a control. Also, the same test was performed for the cable that was forcibly deteriorated by heat (5 days at 100 ° C). The result
It is shown in Table 1 together with the coating workability of the paint and the oxygen index (the oxygen index was measured only for Examples 6 and 7).

The evaluation in the rat repellent test is as follows: -in the case of no damage, and in the case of bite damage depending on the degree-
It is indicated by ++++. In other words, + means 1 to 2 test scratches,
++ shows 5 bites, ++ shows 10 bites, ++++
Indicates that 10 or more bites were observed. Also, in the table,
Comparative examples are shown in Comparative Examples 1 and 2 in which either one of the terpenoid compound and capsaicin was blended alone, and in Comparative Example 3, a cycloheximide formulation (trade name: Naramycin manufactured by Tanabe Seiyaku Co., Ltd.) was blended as a repellent component. All of the examples are shown for comparison with the present invention.

[0021]

[Table 1]

[0022]

As is apparent from the above examples, the pest repellent paint of the present invention comprises (a) a terpenoid compound and
(b) Since it contains capsaicin, by applying this, the article to be coated can be protected from damage by various pests such as rats for a long time. Moreover, both (a) terpenoid compounds and (b) capsaicin are natural aroma components or pungency components, so they are excellent in safety, and they are also thermally stable, so they are not affected by heat during use of the product to be coated. The repellent effect is not impaired. Furthermore, it is inexpensive and excellent in economy. Therefore, the existing wire
It can be widely applied from cables to various structures, and can protect these easily, safely and economically from the damage of pests.

Claims (1)

[Claims] 1. A pest repellent paint comprising (a) a terpenoid compound and (b) capsaicin.