JP4194070B2 - Anti-fungal discoloration composition for wood - Google Patents
Anti-fungal discoloration composition for wood Download PDFInfo
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- JP4194070B2 JP4194070B2 JP2002084673A JP2002084673A JP4194070B2 JP 4194070 B2 JP4194070 B2 JP 4194070B2 JP 2002084673 A JP2002084673 A JP 2002084673A JP 2002084673 A JP2002084673 A JP 2002084673A JP 4194070 B2 JP4194070 B2 JP 4194070B2
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- wood
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Description
【0001】
【発明の属する技術分野】
本発明は、木材に発生するカビや変色菌を防ぐために用いられる木材防カビ防変色菌組成物に関するものである。
【0002】
【従来の技術】
従来、木材用防カビ剤としてハロゲン化フェノール化合物や有機錫化合物が多く利用されてきた。しかしながらこれらの化合物は急性及び慢性毒性が強く、また比較的難分解性であることから蓄積による二次公害の懸念があり、これらの木材防カビ剤は使用に適さなくなってきた。このため、より安全性の高い木材防カビ剤の開発が盛んに行われるようになり3-ヨード-2-プロピニルブチルカーバメート(以下IPBCと略す)などの化合物が提供されており、木材におけるカビの発生を防止するために添加されることが多い。しかしながらIPBCのみの単一成分の使用では、効力を有する微生物の種が限られるなどの理由で十分な効力が得られず、薬剤の使用量が増え、コストも高くなることが多い。また、4,5-ジクロロ-2-n-オクチルイソチアゾリン-3-オン(以下COITと略す)及び2-ベンズイミダゾールカルバミン酸メチル(以下BCMと略す)は安全性の高い工業用の防カビ剤として知られているが、単独に適用した場合には微生物の抵抗性がしばしば生じるため、適用濃度をかなり高くしなければ十分な効力を得ることができず、防カビ剤としては著しく適正を欠いていた。
【0003】
【発明が解決しようとする課題】
このため各種防カビ剤を組み合わせ、防カビスペクトルの安定化や防カビ効力の増強などが試みられているが、通常はいずれか一方の効果の発現に留まるか、相加的な効果しか得られないのが実情である。例えば特開昭63−41405号には上記IPBCに1,4-ビス-(2-エチルヘキシル)スルホコハク酸ナトリウムを安定剤として使用する方法、さらに特開平2−164803号には、上記IPBCとベンズイミダゾール系化合物を合剤にする方法が提案されている。また、特開平3−251508号にはベンズイミダゾール系化合物とイソチアゾリン系化合物を合剤にする方法、さらに特開平7−133205号にはCOITとIPBCを合剤にする方法が提案されている。
しかしながら、木材上に発生する真菌はカビの他、変色菌があり、最近、変色菌による被害も多く見られるようになった。そこで、これらに対しても効果をもった更なる広い抗菌スペクトルの薬剤が望まれていた。
【0004】
【課題を解決するための手段】
本発明者は、前記効力不足を補う木材防カビ防変色菌組成物に関し、鋭意研究を重ねた結果、有効成分としてCOITとBCMとメチレンビスチオシアネート(以下、MBTCと略す)の3種を組み合わせた場合、それぞれ単独あるいは2種合剤で用いた場合と比較して飛躍的に防カビ効力が増大し、かつ、変色菌にも有効になることを見出した。さらに本発明組成物にIPBCを加えることにより防カビ防変色菌効力が増大することを見出し本発明を完成した。すなわち、本発明はCOITとBCMとMBTCの3種、あるいはIPBCとCOITとBCMとMBTCの4種を有効成分として含有することを特徴とする木材用防カビ防変色菌組成物である。
【0005】
【発明の実施の形態】
本発明の木材用防カビ組成物は使用目的に応じて直接適用することもできるが、一般的には油剤、乳剤、ペースト剤、懸濁剤などの剤型として使用する。製剤化する場合に用いる極性溶媒としては、エチレングリコール、プロピレングリコール、ジエチレングリコール、トリエチレングリコール、ジプロピレングリコール、へキシレングリコール、ポリエチレングリコールなどのグリコール系溶剤、ジエチレングリコールモノメチルエーテル、ジエチレングリコールモノエチルエーテル、ジエチレングリコールモノブチルエーテルなどのグリコールエーテル系溶剤、イソプロピルアルコール、エタノールなどのアルコール系溶剤、ジメチルアセトアミド、ジメチルスルホキシド、γ−ブチロラクトン、メチルエチルケトンまたは水などの溶媒が使用できる。これらは、単独で用いても良いし、2種以上を組み合わせても良い。
【0006】
非極性溶媒としては、フタル酸ジオクチル、フタル酸ジイソノニルなどの可塑剤、キシロール、トルエン、イソホロン、フェニルキシリルエタン、ジエチレングリコールモノブチルエーテルアセテート、プロピレンカーボネート、流動パラフィン、灯油、椰子油、菜種油、綿実油、ヒマシ油または、大豆油などの溶媒が使用できる。これらは、単独で用いても良いし、2種以上を組み合わせても良い。また、極性溶媒と非極性溶媒を2種以上組み合わせてもよい。界面活性剤は使用しても使用しなくてもよく、使用する場合は、非イオン界面活性剤、陰イオン界面活性剤、陽イオン界面活性剤、両イオン界面活性剤のいずれを用いてもかまわない。
【0007】
非イオン系界面活性剤として例えばポリオキシエチレンアルキルフェニルエーテル、ポリオキシエチレンスチリルフェニルエーテル、ポリオキシエチレンアルキルエーテル、ソルビタン脂肪酸エステル、ポリオキシエチレンソルビタン脂肪酸エステルなどが挙げられ、陰イオン系界面活性剤としてアルキルベンゼン硫酸塩、ポリオキシエチレンアルキルエーテル硫酸塩、ポリオキシエチレンアルキルフェニルエーテル硫酸塩、ジアルキルスルホコハク酸塩などが挙げられ、陽イオン系界面活性剤では脂肪族アミン塩およびその4級アンモニウム塩などが挙げられ、両イオン系界面活性剤ではベタイン型界面活性剤、アミノカルボン酸塩などが挙げられるが、これらに限定されない。
【0008】
また、これらの非イオン系界面活性剤、陰イオン系界面活性剤、陽イオン系界面活性剤および両イオン系界面活性剤は1種を単独に用いても2種以上を併用してもよい。本発明組成物中における有効成分の含有割合は特に限定されるものではないが、BCMとCOITの配合比率は重量比で10:1〜1:10、好ましくは5:1〜1:5であり、BCMとCOITの合計量と、MBTCとの配合比率は重量比で10:1〜1:10、好ましくは5:1〜1:5、BCMとCOITとMBTCの合計量と、IPBCとの配合比率は重量比で10:1〜1:10、好ましくは5:1〜1:5である。また他の防カビ剤、殺菌剤、殺虫剤、防錆剤、劣化防止剤などを配合して使用することも可能である。
【0009】
【実施例】
次に本発明の実施例及び比較例を挙げて説明するが、本発明はこれらに限定されるものではない。以下に示した配合比率はすべて重量%である。
【0010】
実施例1〜3、比較例1〜11の木材用防カビ防変色菌組成物を表1に示す。比較例1、3、4、5、7、9は、表1に示す配合比率で常温において通常の攪拌によって防カビ防変色菌組成物を得た。また、実施例1、2、3、比較例2,6,8,10,11は、表1に示す配合で混合し、直径1mmのガラスビーズと混合し約15分間粉砕し、金網でろ別することによって防カビ防変色菌分散組成物を得た。
【0011】
【表1】
*1:ポリオキシエチレンスチリルフェニルエーテル
*2:プロピレングリコール
【0012】
試験例1 木材の防カビ試験
水で規定濃度となるように希釈した実施例及び比較例の木材用防カビ防変色菌組成物の溶液中にベイマツ辺材(2cm×5cm×0.3cm)を30秒浸漬した後風乾する。この試験片をポテトデキストロース寒天培地(以下、PDA培地とする)上に載せ、カビの混合胞子懸濁液1mlをふりかけて温度26℃、湿度95%で28日間培養した。供試菌としては、Aspergillus niger、Penicillium funiculosum、Aureobasidium pullulans、Gliocladium virens、Cladosporium cladosporioides及びNeurospora sp.を用いた。結果を表2に示す。ただし、カビ生育の程度の表示は次の判定基準によった。
【0013】
−:試験片にカビの生育を全く認めない。
+:試験片の側面にカビの発育が認められる。
++:試験片上のカビの発育部分の面積が全面積の1/3未満である。
+++:試験片上のカビの発育部分の面積が全面積の1/3以上である
【0014】
試験例2 木材の防変色菌試験
シャーレにPDA培地を固化させた上にエチレンオキサイドガス滅菌された無処理のベイマツ(餌木)を置く。これに木材変色菌Ceratocystis sp.の胞子懸濁液2mlを滴下し、26℃、相対湿度90%で2週間前培養した。一方、試験片は水で規定濃度となるように希釈した実施例及び比較例の木材用防カビ防変色菌組成物の溶液中にベイマツ辺材(2cm×5cm×0.3cm)を30秒浸漬した後風乾する。前培養後、菌が生育した餌木の上に薬剤処理された試験体を載せ、26℃、相対湿度90%で28日間培養した。
結果を表2に示す。ただし、変色菌生育の程度の表示は次の判定基準によった。
【0015】
−:試験片に変色菌の生育を全く認めない。
+:試験片の側面に変色菌の発育が認められる。
++:試験片上の変色菌の発育部分の面積が全面積の1/3未満である。
+++:試験片上の変色菌の発育部分の面積が全面積の1/3以上である。
【0016】
【表2】
表2の結果から明らかなように、本発明組成物は比較例に比べ、カビ及び変色菌に対して著しい効力が認められた。
【0017】
【発明の効果】
本発明組成物は木材に発生するカビや変色菌に対し高い防カビ防変色菌効力を示し、木材用防カビ防変色菌剤として好適である。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a wood fungus-proofing and discoloring fungus composition used to prevent mold and discoloration that occur on wood.
[0002]
[Prior art]
Conventionally, halogenated phenol compounds and organotin compounds have been widely used as anti-mold agents for wood. However, since these compounds have strong acute and chronic toxicity and are relatively persistent, there is a concern of secondary pollution due to accumulation, and these wood fungicides have become unsuitable for use. Therefore, the development of safer wood fungicides has been actively carried out, and compounds such as 3-iodo-2-propynyl butyl carbamate (hereinafter abbreviated as IPBC) have been provided. Often added to prevent occurrence. However, the use of a single component of only IPBC does not provide sufficient efficacy because of limited species of microorganisms that have efficacy, and the amount of drug used increases and costs often increase. 4,5-dichloro-2-n-octylisothiazolin-3-one (hereinafter abbreviated as COIT) and methyl 2-benzimidazolecarbamate (hereinafter abbreviated as BCM) are highly safe industrial fungicides. It is known, but when applied alone, resistance to microorganisms often occurs, so that sufficient efficacy cannot be obtained unless the applied concentration is considerably increased, and it is extremely inadequate as a fungicide. It was.
[0003]
[Problems to be solved by the invention]
For this reason, various antifungal agents have been combined to try to stabilize the antifungal spectrum and enhance the antifungal efficacy, but usually only one of the effects is achieved or only an additive effect is obtained. There is no actual situation. For example, JP-A-63-41405 discloses a method using sodium 1,4-bis- (2-ethylhexyl) sulfosuccinate as a stabilizer in the above IPBC, and JP-A-2-164803 discloses the above-mentioned IPBC and benzimidazole. There has been proposed a method in which a compound is used as a mixture. JP-A-3-251508 proposes a method of combining a benzimidazole compound and an isothiazoline compound, and JP-A-7-133205 proposes a method of combining COIT and IPBC.
However, fungi that develop on wood include molds and discoloration bacteria. Recently, many damages caused by discoloration bacteria have been observed. Therefore, a drug with a broader antibacterial spectrum that has an effect on these has been desired.
[0004]
[Means for Solving the Problems]
As a result of earnest research, the present inventor has combined three kinds of COIT, BCM, and methylene bis thiocyanate (hereinafter abbreviated as MBTC) as a result of extensive research on the antifungal color-controlling fungus composition that compensates for the above lack of efficacy. In some cases, it was found that the fungicidal efficacy was dramatically increased as compared with the case where each was used alone or in combination of two kinds, and also effective against discoloration bacteria. Furthermore, the present invention was completed by finding that the addition of IPBC to the composition of the present invention increases the antifungal and anti-color-changing fungus efficacy. That is, the present invention is an antifungal color-changing fungus composition for wood, characterized by containing three kinds of COIT, BCM and MBTC, or four kinds of IPBC, COIT, BCM and MBTC as active ingredients.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
Although the antifungal composition for wood according to the present invention can be directly applied according to the purpose of use, it is generally used as a dosage form such as an oil, emulsion, paste or suspension. Examples of polar solvents used for formulation include glycol solvents such as ethylene glycol, propylene glycol, diethylene glycol, triethylene glycol, dipropylene glycol, hexylene glycol, and polyethylene glycol, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, and diethylene glycol mono Solvents such as glycol ether solvents such as butyl ether, alcohol solvents such as isopropyl alcohol and ethanol, dimethylacetamide, dimethyl sulfoxide, γ-butyrolactone, methyl ethyl ketone or water can be used. These may be used alone or in combination of two or more.
[0006]
Nonpolar solvents include plasticizers such as dioctyl phthalate and diisononyl phthalate, xylol, toluene, isophorone, phenylxylylethane, diethylene glycol monobutyl ether acetate, propylene carbonate, liquid paraffin, kerosene, coconut oil, rapeseed oil, cottonseed oil, castor A solvent such as oil or soybean oil can be used. These may be used alone or in combination of two or more. Two or more polar solvents and nonpolar solvents may be combined. Surfactants may or may not be used. When they are used, any of nonionic surfactants, anionic surfactants, cationic surfactants, and amphoteric surfactants may be used. Absent.
[0007]
Examples of nonionic surfactants include polyoxyethylene alkyl phenyl ether, polyoxyethylene styryl phenyl ether, polyoxyethylene alkyl ether, sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester, and the like. Examples thereof include alkylbenzene sulfate, polyoxyethylene alkyl ether sulfate, polyoxyethylene alkylphenyl ether sulfate, and dialkyl sulfosuccinate. Examples of cationic surfactants include aliphatic amine salts and quaternary ammonium salts thereof. Examples of amphoteric surfactants include, but are not limited to, betaine surfactants and aminocarboxylates.
[0008]
These nonionic surfactants, anionic surfactants, cationic surfactants and amphoteric surfactants may be used alone or in combination of two or more. The content ratio of the active ingredient in the composition of the present invention is not particularly limited, but the blending ratio of BCM and COIT is 10: 1 to 1:10, preferably 5: 1 to 1: 5 by weight. The blending ratio of BCM and COIT and MBTC is 10: 1 to 1:10, preferably 5: 1 to 1: 5, and the blending ratio of BCM, COIT and MBTC, and IPBC. The ratio is 10: 1 to 1:10 by weight, preferably 5: 1 to 1: 5. In addition, other fungicides, bactericides, insecticides, rust inhibitors, deterioration inhibitors and the like can be used in combination.
[0009]
【Example】
Next, although an example and a comparative example of the present invention are given and explained, the present invention is not limited to these. The blending ratios shown below are all by weight.
[0010]
Table 1 shows the antifungal discoloration-proofing fungus composition for wood of Examples 1 to 3 and Comparative Examples 1 to 11. In Comparative Examples 1, 3, 4, 5, 7, and 9, the antifungal and anti-color-changing fungus compositions were obtained by normal stirring at room temperature at the mixing ratios shown in Table 1. In addition, Examples 1, 2, 3 and Comparative Examples 2, 6, 8, 10, and 11 are mixed in the composition shown in Table 1, mixed with glass beads having a diameter of 1 mm, pulverized for about 15 minutes, and filtered through a wire mesh. Thus, an antifungal and anti-color-changing fungus dispersion composition was obtained.
[0011]
[Table 1]
* 1: Polyoxyethylene styryl phenyl ether
* 2: Propylene glycol [0012]
Test Example 1 Anti-fungal test of wood A pine sapwood (2 cm x 5 cm x 0.3 cm) was added to the solution of the anti-fungal discoloration fungus composition for wood of Examples and Comparative Examples diluted to a specified concentration with water. Immerse for 30 seconds and then air dry. This test piece was placed on a potato dextrose agar medium (hereinafter referred to as PDA medium), sprinkled with 1 ml of a mixed spore suspension and cultured at 26 ° C. and 95% humidity for 28 days. As test bacteria, Aspergillus niger, Penicillium funiculosum, Aureobasidium pullulans, Gliocladium virens, Cladosporium cladosporioides, and Neurospora sp. Were used. The results are shown in Table 2. However, the indication of the degree of mold growth was based on the following criteria.
[0013]
-: No mold growth was observed on the test piece.
+: Mold growth is observed on the side of the test piece.
++: The area of the mold growth part on the test piece is less than 1/3 of the total area.
+++: The area of the mold growth part on the test piece is 1/3 or more of the total area.
Test Example 2 Anti-color-changing fungus test on wood A PDA medium was solidified in a petri dish and an untreated bay pine (bait tree) sterilized with ethylene oxide gas was placed. To this, 2 ml of a spore suspension of wood discoloring bacterium Ceratocystis sp. Was dropped, and precultured at 26 ° C. and 90% relative humidity for 2 weeks. On the other hand, the pine sapwood (2 cm × 5 cm × 0.3 cm) was immersed for 30 seconds in the solution of the antifungal discoloration-proofing fungus composition for wood of Examples and Comparative Examples diluted with water to a specified concentration. And then air dry. After the preculture, the test specimen treated with the drug was placed on the prey where the fungus grew and cultured at 26 ° C. and 90% relative humidity for 28 days.
The results are shown in Table 2. However, the display of the degree of growth of discolored bacteria was based on the following criteria.
[0015]
-: No growth of discolored bacteria was observed on the test piece.
+: Growth of discolored bacteria is observed on the side of the test piece.
++: The area of the growth part of the discoloring bacteria on the test piece is less than 1/3 of the total area.
+++: The area of the growth part of the discolored bacteria on the test piece is 1/3 or more of the total area.
[0016]
[Table 2]
As is clear from the results in Table 2, the composition of the present invention was significantly more effective against mold and discoloration bacteria than the comparative example.
[0017]
【The invention's effect】
The composition of the present invention exhibits high antifungal and anti-color-changing fungus activity against mold and discoloration bacteria generated on wood, and is suitable as a fungicide and anti-color-changing fungus for wood.
Claims (2)
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JP2002084673A JP4194070B2 (en) | 2002-03-26 | 2002-03-26 | Anti-fungal discoloration composition for wood |
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JP2002084673A JP4194070B2 (en) | 2002-03-26 | 2002-03-26 | Anti-fungal discoloration composition for wood |
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JP5085041B2 (en) * | 2006-01-19 | 2012-11-28 | 日本曹達株式会社 | Antiseptic / antifungal chemical composition and method for producing antiseptic / antifungal dry wood |
JP2015003863A (en) * | 2013-06-19 | 2015-01-08 | 住化エンバイロメンタルサイエンス株式会社 | Wood anti-microbial composition |
CN106135273A (en) * | 2015-03-17 | 2016-11-23 | 王海山 | A kind of preparation method of the bactericide suppressing growth of fusarium |
CN108605970B (en) * | 2018-03-21 | 2020-10-27 | 广东省石油与精细化工研究院 | Composite mildew preventive for white wet leather making process and preparation and application methods thereof |
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