JP3002280B2 - Wood preservative termite - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wood preservative / anticidal agent for preventing decay of woody materials and preventing damage by termites and other pests.

[0002]

2. Description of the Related Art Wood materials are used for various purposes as building materials, general industrial materials, and general civil engineering materials. However, they are deteriorated by wood rot fungi and eaten by pests such as termites and bark beetles. There are difficulties in long-term use. Therefore, in order to protect the woody material from these causes of deterioration, treatments such as applying an insect repellent to the wood or injecting a preservative are performed, and various chemicals have been proposed.

[0003]

Many of these conventional wood preservatives contain heavy metals such as chromium or arsenic and are toxic, so that their use requires great care. In addition, termites and the like do not always have a high insecticidal effect even with a strong insecticide.

On the other hand, it has been desired to improve the disadvantages of the conventional wood preservatives and wood termites described above.
Accordingly, an object of the present invention is to provide a novel wood preservative / anticidal agent having low toxicity and easy handling.

[0005]

Means for Solving the Problems In order to achieve the object of the present invention, the inventors of the present invention have conducted intensive searches, and no antiseptic or ant-inhibiting effects of wood have been known. The discovery that the compounds exert surprising effects led to the formation of the present invention. That is, the present invention relates to an alkyl betaine-type metal salt compound represented by the following formula [Chemical Formula 1], which is selected from copper salts, zinc salts, lithium salts, barium salts, magnesium salts, aluminum salts, and cobalt salts. It is a wood preservative and termitic agent containing a substance as an active ingredient.

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As the alkyl betaine type metal salt compound used as an active ingredient of the wood preservative / termitic agent of the present invention, similar compounds are known. For example, alkyl dimethyl betaine is known as an amphoteric surfactant and is used for softening fibers. Agent,
Alternatively, it is used as an antistatic agent. However, these betaines and their sodium salt compounds do not have the preservative performance or termite performance of wood, and copper salts,
It has been found for the first time by the present inventor that when a zinc salt, a lithium salt, a barium salt, a magnesium salt, an aluminum salt or a cobalt salt is used, an excellent antiseptic effect and an anti-termite effect are exhibited.

The wood preservative / termitic agent of the present invention containing such a specific alkyl betaine type metal salt compound as an active ingredient is
For example, dissolved in water or an organic solvent containing water,
For example, it can be applied to wood by using an appropriate method such as application to the surface of wood, impregnation by impregnating wood, or injection into wood by pressurization.

[0008]

EXAMPLE A copper compound of an alkyl betaine (ie, M in the above formula [1] is Cu and n is 2), and a zinc compound thereof (ie, M in the above formula [1] is Zn and n is 2) 2), and the lithium compound (that is, M in the above formula [Chemical formula 1] is Li and n is 1
The barium compound (that is, M in the above formula [1] is Ba and n is 2); and the magnesium compound (that is, M in the above formula [1] is Mg, n is 2). And the aluminum compound (ie, M in the above formula [Chemical formula 1] is A
l and n are 3), the cobalt compound thereof (that is, M in the above formula [Chemical Formula 1] is Co and n is 2), and the sodium compound of alkyl betaine (that is, the above formula [Chemical Formula 1] M is Na and n is 1.)
Were dissolved in water so as to be 0.5, 1.0, and 2.0%, respectively, to obtain respective wood treatment chemicals.

On the other hand, test pieces are prepared by cutting the hemlock sapwood and the beech sapwood so that the cut edge is 5 × 20 mm and the length is 40 mm, and immersed in each of the above wood treatment chemicals to reduce the pressure. After that, it was further impregnated with pressure and air-dried in the room for 2 weeks.

[0010] The thus-prepared chemical-treated test piece was left in running water for 1 hour, and then placed in a 60 ° C thermostat.
The weathering operation was repeated 10 times for 3 hours, and JIS A9302 (197
6) An antiseptic effect test was carried out according to "Testing method for antiseptic effect of wood preservative". It should be noted that Japanese quail mushrooms were applied to hemlock wood and Kawatake mushrooms were applied to beech wood.

In addition, a beech test piece subjected to the same weathering operation as above was grounded in a forced decay soil tank placed in a room at a temperature of 26 ± 2 ° C. and a humidity of 90%, and the efficacy against soft rot bacteria was also tested. .

These test results are expressed as preservative efficacy values calculated from the weight loss rate of the test piece treated with the drug and the weight loss rate of the untreated test piece, and are shown in correspondence with the type, concentration and absorption amount of the drug. 1 is shown.

[Table 1]

On the other hand, each of the wood treatment chemicals was injected into a pine sapwood cut to 10 mm × 10 mm × 20 mm and air-dried indoors for 2 weeks. After that, weathering operation was performed in the same manner as above, and JW
In accordance with the method of the comprehensive laboratory test of PA Standard No. 11, the amount of food damage by 150 termites was determined, and the weight loss rate of the test specimen was calculated. Table 2 shows the results of the termite control efficacy test.

[Table 2]

From these results, it was found that the sodium salt had almost no preservative or ant-control effect, whereas
Copper salts, zinc salts, lithium salts, barium salts, magnesium salts, aluminum salts, and cobalt salts all have excellent antiseptic effects (including effects on soft decay) and anti-termite effects, and are conventionally used. It can also be seen that the performance is comparable to that of the copper chromium arsenic-based agent, which is a wood preservative, and can be sufficiently applied to housing members and structural members.

[0015]

The wood preservative / anticidal agent of the present invention can be dissolved in a solvent such as water and applied to wood by an appropriate method. Since it does not contain toxic heavy metals such as chromium and arsenic, it is safe. There is a feature that can be handled.

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Taniuchi ▲ Akira ▼ 12-6 Daigo Kodo-cho, Fushimi-ku, Kyoto-shi, Kyoto (72) Inventor Yuki Kataoka 7-7, Yuyogaoka, Misato-cho, Ikoma-gun, Nara, Japan (58) Field (Int. Cl. ⁷ , DB name) A01N 37/44 CA (STN)

Claims (1)

(57) [Claims] 1. An alkyl betaine type metal salt compound represented by the following formula [Chem. 1], which is selected from a copper salt, a zinc salt, a lithium salt, a barium salt, a magnesium salt, an aluminum salt and a cobalt salt. A wood preservative / termitic agent containing a substance as an active ingredient. Embedded image