JPS6141501A - Wood antiseptic - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Object of the invention (industrial use IP) The present invention relates to a wood preservative. More specifically, the present invention relates to a wood preservative that prevents or suppresses the decay of wood caused by kuzutake mushrooms, Physcomitrella nigra, and C. versicolor.

(Prior Art) In recent years, with the diversification of wood harvesting methods and changes in lifestyles, the need for preservatives and fungicides for wood has become increasingly high. For example, in recent housing environments, the wood used for foundations and foundations is becoming a problem as it rots in a short period of time due to wood-decaying fungi such as Physcomitrella japonica, L. albacus, and C. versicolor.

In this regard, various proposals have been made for agents (wood preservatives) for controlling wood-decaying fungi. t! required for these wood preservatives. krill is made of wood! ! Even if it has no practical effect on molds that harm surfaces, it is powerful against wood-decaying fungi that rot the inside of wood! k. Therefore, it is currently impossible to predict whether such wood-decaying fungi KN can be used even with insecticidal or fungicidal agents. In particular, the evaluation of whether or not it can be used as a wood preservative is carried out using limited tests stipulated in the J-S Industrial Standards (J-S) A-9302 and/or the Japan Wood Preservation Association Standards (JWPA) JL1. For example, T(3F ()lichlo~pheno-A') N, which is well known as a fungicide,
In addition to being toxic, salts such as a do not satisfy such basic performance and are not suitable for practical use.

From this perspective, wood preservatives that have been proposed to date include organic agents such as phenolic compounds, organic halogen compounds, organic M compounds, naphthenic acid compounds, and tar compounds, and CCA (copper) compounds. Inorganic agents such as fluorine compounds, mixtures of chromium compounds and arsenic compounds), and Wolman's salts (mixtures of fluorine compounds, lypium compounds and phenols) are known.

(Problems to be Solved by the Invention) However, conventional agents do not necessarily have a sufficient preservative effect, and in particular, there is a problem in that they cannot sufficiently suppress the damage caused by the three types of wood-decaying fungi mentioned above, which are the wood-destroying fungi. Ta.

The present invention aims to provide a one-of-Fr type wood preservative that exhibits a strong pesticidal effect on Physcomitrella japonica, P. aeruginosa, C. versicolor, and the like.

(W) Structure of the invention Thus, according to this invention, 2-
(Thiocyanomethylthio)benzothiazo-μ and formula (■)
A wood preservative containing methylene bisthiocyanate represented by: NC8-CH, -SCN (II) as an active ingredient is provided.

2-(Thiocyanomethylthio)benzothecy A/(hereinafter referred to as 'I'CMTB), which is one of the active ingredients of this invention.
) itself is Special Publication No. 1@45-14298, Special Publication No. 1
As shown in Publication No. 849-21167, it is generally known to have an inhibitory effect on molds, but its efficacy as a wood preservative is not known.

The other active ingredient, methylene bisthiocyanate (hereinafter referred to as MBTC) itself, can be found in, for example, Chemica μ Apstofct 514! , 1330g column t~C3 (1959), it is known to have antimicrobial activity, but TCM
Like TB, its efficacy as a wood preservative is unknown.

□The wood to which the wood preservative of the present invention is applied is generally wood used for construction, civil engineering work, and fiber raw materials for manufacturing industrial products such as paper and pulp. Examples include red pine, cedar, and beech where the wood-decaying fungus is likely to occur.

When actually using an uninvented wood preservative on wood, it is necessary to use a preservative such as ethano-A/% isopropyl alcohol.
solvents, hydrocarbon oils such as kerosene, xylene, and toluene, glyco-J4 such as ethylene glycol-p, butyl cellosolve, etc.
It is suitable to use it by dissolving it in an organic solvent such as an I-based solvent or dimethybeta-formamide. Also, these Kwk ionic surfactants, nonionic surfactants, cationic surfactants, etc. may be blended.

It can be diluted with water and used as an emulsion. These can be appropriately selected depending on the purpose of use and the method of treating wood.

The concentration of the organic solvent solution or aqueous emulsion of T0MTB and MB'I'O may be appropriately selected in the same way as above, but for example, in the case of pressure injection method or vacuum treatment method, it is usually 0.05 to 1. Approximately 0.2% to 2% is preferable when surface treatment is applied such as coating or dipping, and approximately 0.1 to 2% when mixed into the adhesive pane F. .0
It is about %.

Note that TCMTB: MBTC addition ratio (weight ratio)
is usually 5nia to 'F=3%, preferably 1:2 to 2:1 so as to achieve the above concentration.

TOMTB and MBTC above! The wood preservative of the present invention containing as an active ingredient exhibits a strong control effect against the wood-decaying fungi.

Of course, the wood preservative of the present invention can be used in combination with many existing wood preservatives and insect repellents, such as chlorine compounds such as black mudendacony p, organic phosphorus compounds such as fenitrothion and diazinon, and organic tin compounds,
A mixture of carbamate compounds, boron compounds, and fluorine compounds can be used.

The invention is illustrated below by means of examples.

(Example) TCMTB and MBTC were tested for their antiseptic efficacy against various wood preservative bacteria.

The test compound is TCMTB: MBTC=l:l
An aqueous emulsion containing 30% of the above two components prepared using a non-ionic surfactant and water in a ratio of (weight ratio) is prepared as follows: ) Tests were conducted at various concentrations shown in Table 1 according to the method for testing the preservative efficacy of wood preservatives specified in No. 1. For comparison, T produced in the same manner as above.
The cases of OMTB alone and MBTO alone are also shown in Table 1.

The wood-decaying fungi tested were as follows.

I) Large kuzutake I) Versicolor I) Namidatake 1) Preparation of test pieces Sapwood pieces of S tree species of cedar, red pine and beech (5 x 20
x 40m, the surface is made of wood grain, and the end surface is made of room temperature hardening resin and seamed with 0.5.0, 75.
The above aqueous emulsions adjusted to various concentrations of 1.5 and 2.090 were applied uniformly with a brush so that they adhered at a rate of 110±102/m'', and after air drying, The latter is divided into two groups:
After processing according to the weathering operation method, the two groups were heated to 60℃.
The sapwood was dried until it reached a constant weight and used as a test piece.

2) Preservative test (TvrPA preservative efficacy test method) and results The culture medium is J-KoS modified medium (peptone = 0.5%, malt extract = 1%, glucose = 2.5%, KH2PO4 ==
Q, 3%, MgSO4・'7H2o = o, g%) was used to cultivate wood-decaying fungi in the medium, and test specimens of three tree species and wood-decaying fungi were combined as shown below to perform test cultivation. Ta. The test culture was 26±2℃ for Kawaratake and Okuzutsutake.
The antiseptic efficacy value of the N. alba mushrooms was determined at 20±2°C for 80 days. The results are shown in Table 311. The preservative efficacy value was calculated using the following formula.

However, the test wood-decaying fungi applied to the sapwood chips of three tree species were Japanese cedar spp.
Red pine - Namidatake. When comparing the decay-inhibiting concentration and decay-inhibiting absorption of wood preservatives, it is best to use combinations that yield high weight loss with untreated wood to obtain high preservative efficacy values and compare them. This was an attempt to more comprehensively evaluate the preservative efficacy of.

゛・(Margin below, continued on next page) Q8-・ As is clear from Table 1, each test sample has a preservative efficacy value of 90 or higher, which is said to have a substantial preservative effect. When compared with the compound alone, for example, the 0016% concentration of TOMTB alone is all below 90, and no substantial surface preservative effect is obtained, whereas the compound of the present application is mostly above 90. I understand. In addition, combining TcMTB, which has poor H resistance compared to MBTC,
It is thought that the BTO alone was diluted in terms of concentration and effectiveness, but regardless of this, the % preservative efficacy value (as compared to MBTO alone) was significantly increased. This excellent effect is thought to be due to the synergistic effect of K when each active ingredient is used in combination.

(c) Effects of the Invention As described above, the wood preservative of the present invention exhibits excellent preservative effects against various wood-decaying fungi even when added in a small amount.

Claims (1)

[Claims] 1. Formula (I): ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼ 2-(thiocyanomethylthio)benzothiazole represented by (I) and formula (II): ▲ Numerical formulas, chemical formulas, tables, etc. ▼(II) A wood preservative containing methylene bisthiocyanate as an active ingredient.