JP2003127111A - Penetration auxiliary for lumber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a penetration auxiliary capable of making a lumber modifier such as antiseptics for lumber, a termite preventive agent or the like to uniformly penetrate in a deep range. SOLUTION: The penetration auxiliary are provided by mixing toluene, xylene, alcohol, methanol and dimethyl sulfoxide. A hole of 5 mm in diameter and 3.5 cm in depth is opened on a Yeddo spruce or an Oregon fir of 5.0×5.0×6.0 (cm) with a drill. The penetration additives are quietly injected at a from temperature. When a penetration degree is visually observed with naked eyes, they penetrate in a direction parallel to grains in a short time and the deepest penetration of 2 cm is confirmed even in a direction normal to the grains.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a wood preservative, a wood fungicide, a wood insect repellent, and a wood termite repellent by relaxing the functional film-like composition of plant tissues that inhibits the penetration of substances into wood. , A wood flame retardant, a wood modifier, a wood stain, a wood fragrance and the like, and a permeation aid for promoting the permeation of substances into wood.

[0002]

2. Description of the Related Art Wood has the disadvantage that it is flammable, its mechanical strength is limited, and its performance deteriorates due to corrosion and decomposition by microorganisms, damage by insects and the like.

[0003] Along with research on the types of microorganisms that cause decay and pollution of wood, their breeding conditions, and the types and ecology of insects that eat wood, research on their control has also been conducted. The agent has been developed and put into practical use. An aqueous solution of a water-soluble salt of copper-chromium-arsenic (CCA agent) is suitable for the pressure treatment method and has been widely used because of its high potency, low cost and ease of use. Has been converted to. On the other hand, although drugs with high toxicity and high potency are being actively developed, there are quite a few that have relatively poor water solubility and are easy to handle and use.

Further, research and development for improving and adding value by modifying and improving wood are actively under way. For example, ceramic wood with high fire resistance and antiseptic properties, acetylated wood with high dimensional stability, WPC (wood / plastic combination) with high wear resistance, etc. are known.

Therefore, a technique for impregnating wood preservatives and modifiers has been developed to impregnate the chemicals under vacuum and pressure. For example, a drug is injected by breaking a part of the cell wall of wood by an impregnation technique such as an insizing method, a double diffusion method, a high temperature, a high pressure, a pressure, or a compression method.

[0006]

However, in reality, the chemicals are not sufficiently impregnated, only about 2 mm from the surface, and even at the laboratory level, the depth is about 5 mm. The problem with chemical treatment for wood preservation is that in order to protect wood from damage by microorganisms and insects for a long period of time, it is necessary to allow the drug to penetrate not only to the surface of the wood but also to the inside of the wood. Although it is an important technique for maintenance, it has low penetration of wood to the chemicals with high fat solubility and relatively poor water solubility. The present invention provides a penetration aid capable of uniformly permeating wood preservatives, termites and the like in a deep range.

[0007]

It has been discovered that a penetration aid composed of toluene, xylene and alcohol can penetrate various wood modifiers deep into wood in a short time. Further, by adding dimethylsulfoxide (DMSO) to the penetration aid, it is possible to improve the permeability to wood, and wood preservatives and termites can be used without using a large-scale device such as a pressurizing device. It can easily penetrate inside.

In coniferous trees, the trachea, which is an aggregate of elongated bell-shaped cells, is responsible for the permeation of water and liquids in wood, and the inside of the cells is hollow, and the walls of these cells are numerous. The hole (wall hole) is open. Each wall hole has a valve called a torus that is hung by a radial thread that connects the wall with the surroundings. In other words, the wall hole has a passage provided with a valve, which serves as a path for sap flow in trees and plays a role of a water movement control valve. In raw wood, an effective passage is ensured by opening the wall hole. However, when the wood dries, there is no liquid in the cells and its surface tension pulls the valve toward the mouth opening, closing the mouth of the passage. The wall hole once closed does not open even if the wood is saturated again. In hardwood, since the elements that make up the wood structure are more differentiated and developed, the conduit plays a major role in liquid flow, unlike the artificial conduit and wood fibers, so penetration of the liquid agent is easier than in the softwood temporary conduit. However, the vessel is often closed with a foamy substance called tylose.

[0009]

[Permeability test] Permeability to Scots pine was confirmed by blending toluene, xylene, butanol, isopropanol, methanol and DMSO as shown in FIG. Test 1 As shown in FIG. 1, a 5.0 × 5.0 × 6.0 (cm) piece of spruce pine was drilled with a hole having a diameter of 5 mm and a depth of 3.5 cm, and the mixture of FIG. 2 was permeated at room temperature. The auxiliary agent was gently injected, and the degree of penetration was visually confirmed. The penetration depths in the direction parallel to the wood grain and the direction perpendicular to the wood grain are as shown in FIG.

Test 2 2 cm of a penetration aid having the composition shown in FIG. 2 was placed in a glass container at room temperature.
To the depth of 2 x 1 x 6 (cm) in this container
The spruce pieces of No. 1 were soaked, the permeation aid was permeated, and after 10 minutes, the pieces were taken out and cut to observe the permeation state, and it was confirmed that the permeation was carried out in all the cases.

Test 3 A glass container was injected with a penetration aid having the composition shown in FIG. 2 to a depth of 2 cm, and a cross section of 4.5 × 4.5 (cm) and a length of 6 cm.
Soaked pieces of spruce. After 4 hours, the spruce pieces were taken out, the remaining penetration aid was weighed, and the impregnation amount of the penetration aid was determined. As a result, 14 mg was impregnated on average.

Test 4 As in Test 1, a 5.0 × 5.0 × 6.0 (cm) piece of bay pine was drilled with a hole having a diameter of 5 mm and a depth of 3.5 cm, and at room temperature, as shown in FIG. The penetration aid of the compounding ratio was gently injected, and the penetration degree was visually confirmed. The penetration depths in the direction parallel to the wood grain and the direction perpendicular to the wood grain are as shown in FIG.

Even if the blending ratio of toluene and xylene was changed, the permeability was not affected. In addition, the effect on permeability was not observed even when the structural isomer of xylene was used. When alcohol was added to toluene and xylene, the permeability was slightly improved, but no significant change was observed. The penetrability does not change greatly depending on the type of alcohol, and it can be said that the effect of mixing a single alcohol or a plurality of alcohols is small. It was found that the addition of DMSO significantly improved the permeability to wood, and that the mixture of DMSO in toluene and xylene instead of alcohol had a high permeability. However, considering that the viscosity increases when DMSO is added and the drying time becomes long, it is preferable that the upper limit of DMSO be 10% by weight.

[0014]

EFFECTS OF THE INVENTION Conventional impregnation techniques for wood modifying agents include vacuum / pressure impregnation method / diffusion impregnation method / insizing method, all of which require equipment cost and low energy efficiency. Although the impregnation efficiency of the core was not sufficient, when the penetration aid of the present invention is used, it can be penetrated sufficiently deep from the surface only by contacting the wood with an anti-termite agent, a preservative, etc. Equipment cost and operating cost can be reduced. Moreover, since the penetration aid of the present invention has high permeability to wood, the impregnation work can be completed in a short time, and the treatment efficiency is dramatically improved.

Further, since it can be permeated in a normal temperature and normal humidity environment, it is possible to easily impregnate an undried material with an antiseptic agent or an anti-termite agent, and to dip, spray, or drill a hole. Since it is possible to adopt an injection method such as injection of wood, it is possible to process the wood on site. Penetration aids of the present invention not only wood preservatives, but also other bactericides, pesticides, colorants, surfactants and the like, which are used at the same time as needed, to significantly improve the penetration into wood, It is possible to simultaneously prevent corrosion of wood, coloring of the surface and the inside of wood due to the growth of mold, and damage of termites at the same time. Since it can be used in combination with existing antiseptic and antifungal agents, it has excellent antiseptic and antifungal properties against a wide range of fungi and is highly stable, so that wood can be easily and reliably decayed, making it a wooden structure. The service life of can be 100 years or more.

[Brief description of drawings]

FIG. 1 is an array diagram of holes provided in wood used for a permeability test.

FIG. 2 is a table showing the blending of penetration aids and the penetration performance against spruce pine.

FIG. 3 is a table showing the blending of penetration aids and the penetration performance for Pine pine.

   ─────────────────────────────────────────────────── ─── Continued front page    (71) Applicant 501411455             Honshu Construction Co., Ltd.             3-21-4 Toyama, Shinjuku-ku, Tokyo (72) Inventor Hayao Ito             Limited company No. 401, 33 Noto-cho, Shinjuku-ku, Tokyo             Within Immunobucks Japan F term (reference) 2B230 AA30 BA01 CB01 CB02 CB13                       CC04 CC16 CC24 DA02 EA01                       EA15 EB02 EB03 EC05 EC21

Claims (5)

[Claims] 1. Toluene 60 to 80% by weight, xylene 35
Penetration aid for wood containing 10 to 10% by weight and 5 to 10% by weight of alcohol. 2. The penetration aid according to claim 1, wherein the alcohol is any one of methanol, ethanol, isopropanol or a mixture thereof. 3. A wood penetration aid according to any one of claims 1 and 2, to which dimethyl sulfoxide is added. 4. The wood penetration aid according to claim 3, wherein dimethyl sulfoxide is 10% by weight or less. 5. Toluene 60 to 75% by weight, xylene 30
-10% by weight and 10 to 15% by weight of dimethyl sulfoxide, a penetration aid for wood.