JPH06336408A - Composition for preservation of wood from decay - Google Patents

Abstract

PURPOSE:To obtain a safe composition for the preservation of wood from decay and exhibiting remarkable synergistic effect by using an antiseptic heavy metal compound, a nitrogen compound selected from ammonia, ammonium salts and short-chain amines and a specific boric acid ester oligomer as essential components. CONSTITUTION:This wood preservation composition is composed of (A) an antiseptic heavy metal compound (e.g. hydroxide, carbonate, sulfate, chloride or acetate of copper or zinc), (B) a nitrogen compound selected from ammonia, ammonium salts and short-chain amines (e.g. monoethanolamine) and (C) a boric acid ester oligomer of the formula ((w), (x) and (y) are 1-50). The wood preservation composition exhibits excellent preservation effect when diluted with water and applied to wood by a proper method. Since the composition is free from poisonous heavy metal such as chromium and arsenic, it is excellent from hygienic point of view and can safely be treated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wood preservative composition used for protecting wood materials such as wood and plywood from deterioration such as decay and insect damage.

[0002]

2. Description of the Related Art Woody materials are used as building materials in houses and structures, and are also frequently used as furniture and other general industrial materials or general civil engineering materials. Most of the deterioration of the wood-based material is caused by wood-rotting fungi or feeding damage by pests, and a method of applying an aqueous wood preservative or the like to the surface of wood or the like to protect the wood-based material from these deteriorations. There is. However, simple application is not enough to achieve long-term preservation, and the most effective method is to inject and infiltrate the preservative into the wood under pressure. Once permeated, it can be expected to have a high effect on decay and insect damage.

As a wood preservative used for such treatment, an aqueous chromium-copper-arsenic compound-based wood preservative (hereinafter abbreviated as CCA) has been favorably used conventionally, but it is toxic. Since it contains heavy metals, it may cause environmental pollution when disposing of treated wood, which is not desirable for hygiene. Therefore, instead of CCA, there has been an attempt to use a preservative having less hygienic problems. For example, an aqueous solution of copper sulfate or an aqueous solution of copper ammonia has been proposed.

[0004]

However, none of these conventional low-toxicity agents exhibit antiseptic properties comparable to those of CCA, and further low-toxicity agents having high antiseptic and insecticidal effects are desired. Was there. Therefore, the present invention aims to provide a low-toxic wood preservative composition that is safer for humans and the natural environment than the conventional wood preservatives and has an excellent preservative effect.

[0005]

The above object of the present invention is to:
Antiseptic heavy metal compounds, ammonia, ammonium salts,
And a nitrogen compound selected from the group consisting of short-chain amines, and a boric acid ester oligomer of the following formula:

[Chemical 2] W, x, and y in the formula are integers of 1 to 50.

The antiseptic heavy metal compound contained in the composition of the present invention is a water-soluble salt or complex salt of a low-toxic heavy metal, which may react with other components optionally contained in the drug to dissolve the water-soluble salt or the complex salt. A compound which forms a complex salt may be used, and for example, hydroxides, carbonates, sulfates, chlorides, acetates and the like of copper and zinc can be used.

Examples of the short-chain amines in the nitrogen compound contained in the composition of the present invention include alkanolamines such as monoethanolamine, diethanolamine, triethanolamine, ethylenediamine, 1,2-propanediamine, 1 , 3-propanediamine, N, N-
Examples thereof include alkyldiamines such as dimethylethylenediamine and N, N-diethylethylenediamine.

Further, the boric acid ester oligomer contained in the composition of the present invention is a water-soluble compound which forms an intramolecular quaternary ammonium salt, as can be seen from the above chemical formula, and is a Weyl under the trade name of IMPRA BSK. The one supplied by GnbH can be used.

To prepare the composition of the present invention, first, the antiseptic heavy metal compound is dissolved or dispersed in an appropriate amount of water,
Next, a nitrogen compound is added to form a uniform aqueous solution. The boric acid ester oligomer represented by the above chemical formula is further added thereto, mixed and dissolved, and other additives are added as necessary to obtain the wood preservative composition of the present invention.

The composition of the present invention comprises, in addition to the above essential components,
It may contain an organic or inorganic preservative or insect repellent such as a quaternary ammonium salt compound, an azole compound, a boric acid compound or a pyrethroid compound, and may be brought into contact with a stabilizer for the composition itself or treated wood. It may also contain various carbonates, bicarbonates, phosphates, molybdates, nitrites and other salts as rust preventives for the metal parts used. Further, the composition of the present invention may be blended with a size stabilizer for wood such as polyethylene glycol, an antifoaming agent, and a surfactant.

[0011]

[Examples] Using the carbonates and zinc carbonates as the antiseptic heavy metal compounds and the IMPRA BSK as the boric acid ester oligomer of the above chemical formula, the agents of the present invention and the agents of the control are respectively described below. Was prepared as follows. Alkyl (allyl) polyoxyethylene phosphate was used as the surfactant together with IMPRA BSK.

[0012]

[Table 1]

Next, the above-mentioned chemicals were pressure-injected into the test pieces of Japanese cedar sapwood by adjusting the injection conditions so that the chemical retention amounts shown in Table 2 were obtained, and JIS A 9201 "Wood The antiseptic performance of each drug was evaluated in accordance with the "preservative performance standard and test method". The results are shown in Table 2 as the average value of the weight loss rate (%) due to the propagation of decay fungi for each 9 test pieces. As the decaying fungi, two types, Pleurotus cornucopiae and Pleurotus cornucopiae, were used.

[0014]

[Table 2]

From these results, the drug containing the antiseptic heavy metal compound, the nitrogen compound and the boric acid ester oligomer represented by the above chemical formula is the drug containing the antiseptic heavy metal compound and the nitrogen compound as the active ingredients or the boric acid ester oligomer as the active ingredient. The antiseptic performance is superior to that of any of the contained drugs, and it can be seen that it has a great synergistic effect.

[0016]

Industrial Applicability The wood preservative composition of the present invention exhibits excellent preservative performance when diluted with water and applied to wood by an appropriate method, and contains toxic heavy metals such as chromium and arsenic. Since it is not used, it is excellent in hygiene and has the feature that it can be handled safely.

Claims (2)

[Claims] 1. A wood preservative composition comprising a preservative heavy metal compound, a nitrogen compound selected from the group consisting of ammonia, ammonium salts, and short-chain amines, and a borate oligomer of the following formula. . [Chemical 1] W, x, and y in the formula are integers of 1 to 50. 2. The wood preservative composition according to claim 1, further comprising a surfactant.