JP2001334503A - Insecticidal treating agent for lumber and insecticidal treating method using the agent - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an insecticidal treating agent for lumber which does not impart a bad influence to the human body and an insecticidal treating method using the same. SOLUTION: An inside of lumber is impregnated with an inorganic first liquid having silicic acid as a main component and thereafter, further impregnated with an inorganic second liquid having a silane as a main component.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insect repellent for wood and a method for treating insects using the same.

[0002]

2. Description of the Related Art Conventionally, various insect repellents and insect repellent treatment methods have been proposed to protect a building made of wood from damage by insects such as termites.

For example, as an insect repellent for wood, organic phosphorus-based or organic fluorine-based agents have been widely used.

In addition, as a method of treating insects on wood, the insecticide for wood is sprayed under the floor of a building, or the insecticide is applied or impregnated on wood.

[0005]

However, since the above conventional insect repellents are organic phosphorus-based or organic fluorine-based chemicals, they are highly toxic and vaporize after use. In addition to the possibility of adverse effects, maintaining the efficacy as a drug by vaporization is limited to only a few years, and it has been necessary to spray or apply the drug again afterwards.

When the above-mentioned conventional wood insect repellent is applied to the surface of wood or impregnated into wood, the pores formed inside the wood are filled with an organic chemical. As a result, the respirability and strength inherent in wood are impaired.

[0007]

Accordingly, an object of the present invention is to provide an insect repellent for wood containing a compound of silicic acid and metal ions as a main component.

Another object of the present invention is to provide an insect repellent for wood comprising an inorganic first liquid mainly composed of silicic acid and a second inorganic liquid mainly composed of silane.

Further, an odorant which emits a natural enemy odor of a target pest is added.

[0010] As a method for controlling insects on wood using the above insect repellent for wood, a first liquid containing silica as a main component is applied to the surface of the wood, and then the inorganic liquid containing silane as a main component is further applied. The second liquid was applied.

Alternatively, the inside of wood is impregnated with an inorganic first liquid mainly composed of silicic acid, and then further impregnated with a second inorganic liquid mainly composed of silane.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The insect repellent for wood according to the present invention is an inorganic chemical containing a compound of silicic acid and metal ions represented by, for example, lithium silicate as a main component.

By applying such a chemical solution to the surface of wood or impregnating the interior of the wood, a compound of silicic acid and metal ions adheres to the surface of the pores inside the wood, and the insects such as termites approaching the wood. Takes repellent action against the compound of silicic acid and metal ions, thereby preventing wood damage. The pests mentioned here include wood rot fungi.

That is, when a pest such as a termite eats wood impregnated with the above insect-controlling agent, silica is separated by the action of formic acid in the body of the pest and a silicate compound is generated, whereby the pest can be killed. Furthermore, the remaining pests take repellent action due to the learning effect of the pests instinctively.

Further, the insect repellent for wood according to the present invention comprises:
It is composed of a first inorganic liquid mainly composed of silicic acid and a second inorganic liquid mainly composed of silane.

As the first liquid, for example, alkali silicate,
Solutions such as alkali aluminate and lithium silicate can be used.

As the second liquid, for example, a mixed solution of monosilane or decyltrimethoxysilane and polyhydride silicon can be used.

Then, the first liquid is applied to the surface of the wood or impregnated with the first liquid into the interior of the wood, whereby the first liquid penetrates into the interior of the wood, and is applied to the surface of the pores inside the wood. Pests such as termites approaching the wood to which the silicate compound adheres take a repelling action against the silicate compound, thereby preventing the wood from being damaged.

That is, when a pest such as a termite eats wood impregnated with the above insect-controlling agent, silica is separated and a silicate compound is generated by the action of formic acid in the body of the pest, whereby the pest can be killed. Furthermore, the remaining pests take repellent action due to the learning effect of the pests instinctively.

Further, when the silicate compound adheres to the surface of the pores inside the wood, the strength of the wood can be enhanced.

Thereafter, the second liquid is further applied to the surface of the wood or impregnated with the second liquid into the interior of the wood, whereby the second liquid penetrates into the interior of the wood and the surface of the pores inside the wood is exposed. The silane compound adheres to the varnish, and the water repellency of the silane compound reduces the water absorption of the wood, thereby also increasing the strength of the wood.

These chemicals uniformly coat the surface of the pores inside the wood irrespective of its size, and therefore do not impair the heat insulation and air permeability inherent in the wood, and maintain a proper dry state of the wood. Can be held.

Moreover, since the dry state of the wood can be maintained by the water repellency of the silane compound, it is possible to prevent the deterioration of the wood due to the propagation of decay fungi.

Further, since the above-mentioned liquid medicine is inorganic, it is chemically stable, has no effect on the human body, has no fear of vaporization, and maintains its effect as a medicine for a long period of time.

In particular, by adding an odorant which emits a natural enemy odor of the target pest to the above-mentioned chemical solution, most of the pests take a repelling action on the wood, thereby reliably preventing the wood from being damaged. can do.

[0026]

EXAMPLES Examples of the present invention will be specifically described below.

(First Embodiment) A 50% aqueous solution of lithium silicate (SiO ₂ + LiO molar ratio 3.5), which is a compound of silicic acid and metal ions, was applied to the surface of wood (square material).

The aqueous solution of lithium silicate permeates from the surface of the wood toward the inside, and accordingly, the lithium silicate adheres to the surface of the pores inside the wood.

When such wood is left in an environment where termites breed, it has been confirmed that several pests die after biting the wood, and the remaining pests take repellent action against the wood, whereby It was found that eating damage could be prevented beforehand.

This is because when a pest such as a termite eats wood impregnated with the above insect repellent, silica is separated by the action of formic acid in the body of the pest and a silicate compound is generated, thereby killing the pest. Yes, and
It is considered that the remaining pests take repellent action due to the learning effect of the pests instinctively.

Further, the strength of the wood is enhanced by the above treatment. That is, the application of the aqueous solution of lithium silicate causes the lithium silicate to adhere to the pore surfaces inside the wood, thereby improving the strength of the wood.

The lithium silicate uniformly covers the pore surfaces inside the wood irrespective of its size, and thus does not impair the heat insulation and air permeability inherent in the wood.

Second Embodiment A 50% aqueous solution of lithium silicate (SiO ₂ + LiO molar ratio 3.5), which is a compound of silicic acid and metal ions, is used as a natural enemy of termites. An odorant emitting a body hormone odor was added and applied to the surface of wood (square wood).

When such wood is left in an environment where termites breed, it has been confirmed that most of the pests take repellent action against the wood, whereby it was found that the wood could be prevented from being damaged. .

(Third Embodiment) As a first liquid, an aqueous solution of lithium silicate (SiO ₂ + LiO molar ratio: 3.5) was used, and as a coloring agent, a mixed solution of dextrin (red food) and Red No. 3 (dextrin 50) %) Was added.

As a second liquid, a mixed solution of decyltrimethoxysilane (CH ₃ (CH ₂ ) ₉ Si (OCH ₃ ) ₃ ) and silicon polyhydride (SiHn) (decyltrimethoxysilane 85%) was used. Use
Yellow No. 4 was added thereto as a coloring agent.

When the first liquid is applied to the surface of the wood, the first liquid permeates from the surface of the wood toward the inside, and accordingly, lithium silicate adheres to the surface of the pores inside the wood.

Immediately after the application, only the portion of the tile surface to which the first liquid was applied was colored red, and it was observed that the color of the tile changed from red to light brown as the first liquid dried. At this time, it was also observed that the larger the amount of application, the deeper the red color.

Next, when the second liquid is applied to the surface of the wood,
The second liquid permeates inward from the surface of the wood, and accordingly, decyltrimethoxysilane adheres to the pore surfaces inside the wood.

Immediately after the application, only the portion of the surface of the tile to which the second liquid has been applied is colored yellow, and as the second liquid dries, the color changes from yellow to the ground color of the tile itself. Was done. At this time, it was also observed that the larger the coating amount, the deeper the yellow color.

When such wood is left in an environment where termites breed, it has been confirmed that several pests die after biting the wood, and that the remaining pests take repellent action against the wood. It was found that eating damage could be prevented beforehand.

In addition, the above treatment enhances the strength of the wood. That is, by applying the first liquid, the strength of the wood is improved by attaching lithium silicate to the surface of the pores inside the wood, and by applying the second liquid, decyltrimethoxysilane is applied to the pores inside the wood. By adhering to the surface, the water repellency of decyltrimethoxysilane reduces the water absorption and improves the strength of the wood.

The first liquid and the second liquid uniformly cover the surface of the pores inside the wood irrespective of its size, so that the heat insulation and air permeability inherent in the wood are not impaired.

Further, by adding a colorant to the first liquid or the second liquid, it is possible to easily visually determine the application amount, the application range, and the dry state of the first liquid or the second liquid.

In other words, the amount of application to the wood can be determined by the shade of the color of the wood surface immediately after application, and the application range to the wood can be determined by the range of coloration of the wood surface. Furthermore, the dry state of the first liquid or the second liquid can be determined based on the change in the color of the wood surface.

Thus, the operation of applying the first liquid or the second liquid can be simplified.

Coloring agents that change color include those that change color by dehydration, those that change color by oxidation, and those that change color by light rays such as ultraviolet rays. It is also known as an amine-based or amine-based paint.

(Fourth Embodiment) A 50% aqueous solution of lithium silicate (SiO ₂ + LiO molar ratio: 3.5) was used as the first liquid, and decyltrimethoxysilane (CH ₃ (CH ₂ ) ₉ Si ( OC
A mixed solution of H ₃ ) ₃ ) and silicon polyhydride (SiHn) (decyltrimethoxysilane 85%) was used.

Then, the wood is put into the container filled with the first liquid, and left standing all day long to impregnate the wood with the first liquid. Thereafter, the wood is further poured into the container filled with the second liquid. It was charged and left overnight to impregnate the wood with the second liquid.

When such wood is left in an environment where termites breed, it has been confirmed that several pests die after biting the wood, and that the remaining pests take repellent action against the wood. It was found that eating damage could be prevented beforehand.

Fifth Embodiment A 50% aqueous solution of lithium silicate (SiO ₂ + LiO molar ratio: 3.5) was used as a first liquid, and decyltrimethoxysilane (CH ₃ (CH ₂ ) ₉ Si ( OC
A mixed solution of H ₃ ) ₃ ) and silicon polyhydride (SiHn) (85% decyltrimethoxysilane) was used. Odorants that emit body hormone odors such as soldier ants were added.

Then, the wood is put into the container filled with the first liquid, and left standing all day long to impregnate the wood with the first liquid. Thereafter, the wood is further poured into the container filled with the second liquid. It was charged and left overnight to impregnate the wood with the second liquid.

When such a wood is left in an environment where termites breed, it is confirmed that the termites approaching the wood take a repelling action against lithium silicate, thereby preventing the wood from being damaged. I understood.

[0054]

The present invention is embodied in the form described above and has the following effects.

That is, a chemical solution containing a compound of silicic acid and metal ions as a main component is applied to the surface of wood, or
By impregnating the inside of the wood, the compound of silicic acid and metal ions adheres to the surface of the pores inside the wood, and termites such as termites approaching the wood take repellent action against the compound of silicic acid and metal ions, Wood damage can be prevented beforehand.

Further, by applying an inorganic chemical solution mainly composed of silicic acid to the surface of wood or impregnating the interior of the wood, the chemical solution penetrates the interior of the wood and causes the surface of the pores inside the wood to enter the interior of the wood. Pests such as termites, which adhere to the silicate compound and approach the wood, repel the silicate compound and can prevent the wood from being damaged.

Thereafter, a chemical solution containing silane as a main component is applied to the surface of the wood or impregnated in the wood, so that the chemical solution penetrates into the wood, and the surface of the pores in the wood is formed. The silane compound adheres to the wood, and the water repellency of the silane compound reduces the water absorption of the wood, thereby also increasing the strength of the wood.

These chemicals uniformly coat the pore surface inside the wood regardless of its size, and therefore do not impair the heat insulation and air permeability inherent in the wood, and keep the wood in a dry state. be able to.

Moreover, since the dry state of the wood can be maintained by the water repellency of the silane compound, it is possible to prevent the deterioration of the wood due to the propagation of decay fungi.

Further, since the chemical is inorganic, it is chemically stable, has no adverse effect on the human body, does not vaporize, and can maintain its effect as a medicine for a long period of time.

In particular, when an odorant which emits a natural enemy odor of the target pest is added to the above-mentioned chemical, most of the pests take repellent action on the wood, thereby ensuring that the wood is not damaged. Can be prevented.

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Claims (6)

[Claims] 1. A wood insect repellent comprising a compound of silicic acid and metal ions as a main component. 2. The insect repellent for wood according to claim 1, further comprising an odorant which emits a natural enemy odor of the target pest. 3. A wood insect repellent comprising an inorganic first liquid mainly composed of silicic acid and a second liquid inorganic substance mainly composed of silane having water repellency. 4. The insect repellent for wood according to claim 3, wherein an odorant emitting a natural enemy odor of a target pest is added to at least one of the first liquid and the second liquid. 5. A method of applying an inorganic first liquid mainly composed of silicic acid to the surface of wood, and further applying an inorganic second water-repellent liquid mainly composed of silane. Insect repellent treatment of wood. 6. An insect repellent treatment of wood, wherein the wood is impregnated with a first inorganic liquid mainly composed of silicic acid, and then further impregnated with a second inorganic liquid mainly composed of silane. Method.