JPH0469303A - Antifungal agent for wood - Google Patents

Abstract

PURPOSE:To obtain the subject antifungal agent showing a high effect in a low concentration by blending 2,4,5,6-(tetrachloroisophthalonitrile) with a compound such as methylene bisthiocyanate or 3-iode-2-propionyl-n-butylcarbanate. CONSTITUTION:An antifungal agent for wood prepared by blending 2,4,5,6-(tetrachloroisophthalonitrile) with one or more compounds selected from methylene bisthiocyanate, 3-iode-2-propionyl-n-butylcarbamate and 2- methoxycarbonylaminobenzimidazole. If each of the above-mentioned compounds is used separately, no sufficient effect is obtained without using it in a high concentration. If using the above-mentioned compounds in combination, a high antifungal effect is obtained in a low total concentration due to an additive effect.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a fungicide used to prevent mold from forming on wood.

[Conventional technology]

2.4,5.6-(tetrachloroiso7talonitrile) has been used as a chemical to prevent the growth of mold on wood.
is provided as a representative example. Then, a wood fungicide is prepared by dispersing or dissolving this chemical in water at a predetermined concentration, and the wood is dipped in the wood fungicide, or the wood is coated or sprayed with the wood fungicide. It is used for anti-fungal treatment.

[Problems to be Solved by the Invention] However, the second drug does not have sufficient antifungal effect at low concentrations, and must be used at high concentrations to obtain sufficient antifungal effects, resulting in cost and other issues. I couldn't be satisfied with that. The present invention has been made in view of the above points, and it is an object of the present invention to provide a wood fungicide that can obtain a high fungicide effect even when mixed at a low concentration. [! Means for Solving Problem I 1 The wood fungicide according to the present invention contains 2,4,5,6-(tetrachloroiso7lyronitrile), methylene, sthiocyanate, and 3-iodo-2-propynia. There is a patent which is characterized in that it is a mixture of n-butyl carpanate and at least one of the three types of 2-methoxycarbonyl amide/benzimidazole. The present invention will be explained in detail below. In the present invention, 2,4,5,6-(tetrachloroisophthalonitrile) - hereinafter abbreviated as TCI PN - is used as an essential drug. In addition, in the present invention, methylene bisthiocyanate (hereinafter abbreviated as MBTC) and 3-iodo-2-propynyl-〇-butyl carbonate (hereinafter referred to as IP) are used.
Three drugs are selectively used: BC (abbreviation) and 2-methoxycarbonylamide 7penzimiguzole (hereinafter abbreviated as MERGAL). i.e. MB to TCI PN
The wood fungicide according to the present invention can be prepared by blending one, two, or three of TC, IPBC, and MERGAL. TCIPN alone, MBTC, IPBC, or MERGAL alone cannot provide sufficient antifungal effect unless used at high concentrations;
When RGAL is used in combination, a high antifungal effect can be obtained at a low overall concentration due to their synergistic action. The concentration of TCIPN, MBTC, IPBC, and MERGAL is appropriately set depending on the type of mold to be treated, and is not particularly limited. [Example] The present invention will be illustrated by the tX example below. Wood fungicides were prepared by dissolving 1197TCIPN in water at a concentration of 0.14% by weight (hereinafter abbreviated as %) and IPBC at the concentrations shown in Table 1, respectively. A test for the antifungal performance of this antifungal agent was conducted. The test was conducted based on the test method of the Japan Wood Preservation Association. That is, using a piece of beech wood as a test specimen, this test specimen was immersed in a solution of a wood fungicide for 3 minutes, and then, after drying, the specimen was placed on an agar medium and a suspension of mycelium was applied. After leaving this for 4 weeks, a test was conducted by visually observing it. The results are shown in Table 1. In the table, the AI in the column of mo average evaluation value j for each c-level keyaki is ^5
perH+l1us niger, A2 is Penici
lliuw funiculosum, A3 is Rh1z
opus javanicus, A4 is ＾ureo
bas+dium pullulans, A 5 is G
Each species of liocladium virenS is shown. In addition, the average evaluation value is evaluated as a numerical value of θ ~ 3 for the state of occurrence of each bacterial species, with 0 being a state in which no bacteria occur and 3 being a state in which bacteria have occurred on 1/3 or more of the area of the upper surface of the test piece. It was calculated as the average value of the numerical values evaluated for nine test specimens. Further, in the table, S indicates the total value of the average evaluation values of A1 to A5, D indicates the damage value, and S=S for the untreated test specimen. If S=S of the treated specimen, the damage value D is calculated as follows: D=(S,/S,)X100. It is possible to evaluate that the smaller the numerical value of this damage value is, the higher the mold prevention effect is.-If D is 30 or less, it is judged that it has practical mold prevention performance. can do. Wood anti-mildew shavings were prepared by dispersing only quantitative jLL TCr PN in water at the concentrations shown in Table 2. The antifungal performance of this antifungal agent was tested in the same manner. The results are shown in Table 2. Comparative Example 2 A wood fungicide was prepared by dispersing only IPBC in water at the concentrations shown in Table 3. This fungicide was similarly tested for fungibility performance in Example 1.
As shown in No. 1 in the table, the wood fungicide with a concentration of TCIPNo, 14% and IPBCo, 025% has D=9.
It was possible to obtain a value of 3, whereas TCI PN
When using or IPBC alone, in order to obtain the same value, it is necessary to adjust the concentration of TCI PN to about 0.7% as shown in Table 2 in Comparative Example 1, and also in Comparative Example 2.
As shown in Table 3, it is necessary to adjust the concentration of IPBC to 0.15% or more, and in Example 1, a low concentration of T
It is confirmed that CIPN has a high antifungal effect. Tomo 1 Town Shadow TCI PN at a concentration of 0.14% by weight, MBTC #
Wood fungicides were prepared by dispersing each in water at the concentrations shown in Table S4. The fungicidal performance of this antifouling agent was similarly tested. The results are shown in Table 4. Wood fungicides were prepared by dispersing only MBTC in water at the concentrations shown in Table 2. The antifungal performance of this anti-corrosion agent was tested in the same manner. T the results! I453. (Left below) As seen in No. 2 of Table 4 in Example 2, T
A wood fungicide with a concentration of CIP No. 14% and MBTCo 0.6% was able to obtain a value of D = 18, whereas when using TCI PN or MBTC alone, a similar value was obtained. In order to
It is necessary to adjust the concentration of TCIPN to nearly 0.25%, and it is confirmed that a high antifungal effect can be obtained with a low concentration of TCIPN in Example 2. 111 Shadow TCI PN at a concentration of 0.14% by weight, MERGAL
Wood fungicides were prepared by dispersing each of the following in water at the concentrations shown in Table 6. This fungicide was similarly tested for its antifungal performance. #liS the result
Shown in the table. A wood fungicide was prepared by dispersing only MERGAL (Female 1) in water at the concentrations shown in Table 7. As shown in No. 6 of Table 6 in Example 3, TCIP
No, 14% and MERGALo. Wood mold-proofing with a concentration of 1% was able to obtain a value of D = 12.7, whereas TCI PN and MERGAL
When using TCIPN alone, to obtain a similar value, the concentration of TCIPN should be adjusted to 0.35 as shown in Table 2 in Comparative Example 1.
About %ll! Also, as shown in Table 7 in Comparative Example 4, the concentration of MERGAL must be set to 0.4% or more! In Example 3, a low concentration of T was used.
It is confirmed that CI PN has a high antifungal effect. ■Effects of the Invention As described above, the present invention provides 2,4,5,6-(tetrachloroin-7-trilonitrile) (methylene bisthiocyanate and 3-iodo-2-propynyl-〇-butyl carbonate). and 2-methoxycarbonyl 7-mi/penzimigsol, and the synergistic effect of these combinations increases the fungicidal performance, and 2,4,5゜6-(tetrachloro Iso7talonitrile) can be highly effective in preventing the growth of mold on wood even when used at a low concentration.

Claims (1)

[Claims] (1) Three types of 2,4,5,6-(tetrachloroisophthalonitrile), methylene bisthiocyanate, 3-iodo-2-propynyl-n-butyl carbonate, and 2-methoxycarbonylaminobenzimidazole A wood fungicide characterized by containing at least one of the above.