JP2004115387A - Slime inhibitor and method for inhibition - Google Patents

Slime inhibitor and method for inhibition Download PDF

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Publication number
JP2004115387A
JP2004115387A JP2002277412A JP2002277412A JP2004115387A JP 2004115387 A JP2004115387 A JP 2004115387A JP 2002277412 A JP2002277412 A JP 2002277412A JP 2002277412 A JP2002277412 A JP 2002277412A JP 2004115387 A JP2004115387 A JP 2004115387A
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Japan
Prior art keywords
slime
salt
oxolinic acid
weight
water
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JP2002277412A
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Japanese (ja)
Inventor
Ken Kuriyama
栗山 研
Yasuko Kato
加藤 康子
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Nihon Nohyaku Co Ltd
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Nihon Nohyaku Co Ltd
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Priority to JP2002277412A priority Critical patent/JP2004115387A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To obtain a new slime inhibitor effectively inhibiting slime on which sufficient inhibitory effects cannot be attained with the existing industrial antimicrobial agent, or the like, and to provide a method for inhibiting the slime. <P>SOLUTION: The slime inhibitor comprises oxolinic acid or its salt as an active ingredient. The method for inhibiting the slime comprises adding the oxolinic acid or its salt as the active ingredient to water. The slime inhibitor is effective against slime bacteria for which an existing agent such as isothiazolone becomes hardly effective and which effectively inhibits slime formation. Thereby, a contribution to a reduction of maintenance cost, an improvement in quality of products, efficient operation of systems, and the like, can be attained. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明は、工業用冷却水、紙パルプ工業における抄紙工程水、潤滑油、金属加工油などのスライム抑制剤及びその使用方法に関するものである。
【0002】
【従来の技術】
本発明の有効成分であるオキソリニック酸は公知化合物であり(例えば、特許文献1参照。)、抗菌活性を有する化合物で、従来の使用方法としては、医療用抗細菌剤としての有用性が知られている(例えば、特許文献2参照)。又、農園芸用細菌病害防除剤としての用途も知られている(例えば、特許文献3、非特許文献1参照。)。オキソリニック酸を含む数種の抗細菌剤等とアゾール系抗真菌剤の1種とを組み合わせると、相乗的効果により有用な種子消毒剤として用いられることが記載されている(例えば、特許文献4参照。)。又、工業用としても各種用途に殺菌成分として配合することができ、例えば抗菌繊維(例えば、特許文献5、6参照。)、抗菌紙(例えば、特許文献7参照)、抗菌樹脂(例えば、特許文献8参照。)等にも用いられる。しかしながら、工業用冷却水等に発生するスライムや既存の工業用抗菌剤が効きにくくなった場面への有用性は知られていなかった。
【0003】
【特許文献1】
特公昭43−959号公報 (第4頁、実施例1等)
【特許文献2】
特開昭47−31998号公報 (第3頁、表)
【特許文献3】
特開昭53−24028号公報 (第4−6頁、第2表−第7表)
【特許文献4】
特開平5−155718号公報 (段落番号0017−0024、表1−表4等)
【特許文献5】
特開平9−176966号公報 (第3−4頁、実施例等)
【特許文献6】
特開2000−86411号公報 (第3−4頁、実施例等)
【特許文献7】
特開平9−217297号公報 (第2−3頁、実施例等)
【特許文献8】
特開平9−208408号公報 (第2−3頁、実施例等)
【非特許文献1】
ザ・ペスティサイド・マニュアル(The Pesticide Manual)第11巻、915頁
【0004】
【発明が解決しようとする課題】
工業用冷却水、紙パルプ工業における抄紙工程水、潤滑油、金属加工油などは連続運転により長時間に渡り連続使用されることが多い。こうした水や油類にはスライムが発生しやすく、製品の劣化による損失や、システムのオーバーホールのための工程ロスといった産業上の損害が発生する。こうしたスライムの原因細菌の中には、既存の工業用抗菌剤等では充分に抑制効果を達し得ないものが次第に優先化したり、又耐性菌の発生等によって充分にコントロールできないものも現れて問題化している。こうしたスライムを有効に抑制できる新しい抑制剤やスライム抑制方法の出現が望まれている。
【0005】
【課題を解決するための手段】
本発明はオキソリニック酸又はその塩類を有効成分として含有するスライム抑制剤及びオキソリニック酸又はその塩類を有効成分として水に添加することよりなるスライムの抑制方法を提供するものである。
【0006】
【発明の実施の形態】
本発明において用いられるオキソリニック酸は、化学名:5−エチル−5,8−ジヒドロ−8−オキソ[1,3]ジオキソロ[4,5−g]キノリンー7−カルボン酸で表される公知化合物であり、ザ・ペスティサイド・マニュアル(The Pesticide Manual)第11巻、915頁に農園芸用抗菌剤用途や安全性に関する特性等が記載されている。
本発明にオキソリニック酸を有効成分として用いる場合、遊離酸のままでも任意の塩の形態であっても良く、又場合によってはその水和物であっても良い。任意の塩としては、例えばナトリウム塩、カリウム塩、カルシウム塩、マグネシウム塩、亜鉛塩、アルミニウム塩等の金属塩、アンモニウム塩、ピリジニウム塩、エタノールアミン塩等の形で使用される。
【0007】
オキソリニック酸の有効使用濃度としては、水系に0.1ppm以上存在すれば良く、通常は1〜10ppmの範囲が実用的であり、かつ経済的にも適当である。但し、短時間で効果を得るために10〜1000ppmの高濃度で単発投入する事も有効である。
水中への投入方法としては、オキソリニック酸のアルカリ水溶液又は有機溶剤に溶解した溶液状態、あるいは水和剤、懸濁剤、更には溶出をコントロールした固形製剤に加工して水中に投入すれば良い。
【0008】
本発明のオキソリニック酸又はその塩類は単独でも、1又は2以上の他のスライム抑制剤と共に使用することもできる。他のスライム抑制剤としては、イソチアゾリノン誘導体、第四級アンモニウム塩、ヒドラジン類、ハロニトロ系化合物、ヨードプロパルギル誘導体、チオシアネート系化合物、トリハロメチルチオ系化合物、ビグアニド系化合物、アルデヒド類、フェノール類、ベンズイミダゾール誘導体、ピリジンオキシド、ジフェニルエーテル及びカルボン酸等既存のスライム抑制剤等を用いることが好ましい。
又、これらのスライム抑制剤と相前後して本発明のオキソリニック酸又はその塩類を処理することも有効である。
他の水処理用有効成分、例えば殺藻剤、防錆剤、スケール抑制剤等を混合して用いることもできる。
【0009】
本発明のオキソリニック酸又はその塩類を含むスライム抑制剤は、開放循環式冷却水系に良く見られるスフェロチリス(Sphaerotilis)属に有効である他、エッセリチア コリ(Escherichia coli)等のエッセリチア(Escherichia )属、スタフィロコッカス アウレウス(Staphylococcus aureus )等のスタフィロコッカス(Staphylococcus属、シュードモナス アエルギノーザ(Pseudomonas Aeruginosa)、シュードモナス フルオレッセンス(Pseudomonas fluoresense )等のシュードモナス(Pseudomonas )属、プロテウス ブルガリス(Proteus vulugaris )等のプロテウス(Proteus )属、バチルス ズブチリス(Bacilus subtilis)等のバチルス(Bacilus )属、エンテロバクター アエロゲネス(Enterobacter aerogenes)等のエンテロバクター(Enterobacter)属などの種類の細菌類に対して抗菌効力を有しており、既存薬剤の効果が低下したこれらの菌類に対しても効果を有する。
又、本発明のスライム抑制剤は、上記以外にもパルプ製造工程の添加剤として、また潤滑油、とりわけ金属加工油の分野等にも使用することもできる。
【0010】
【実施例】
以下に、本発明のスライム抑制剤の製造例及びスライム抑制効果試験例を示すが本願はこれらに限定されるものではない。
実施例1.
オキソリニック酸0.5重量部、モノエタノールアミン5.0重量部に水を加えて100重量部とし均一な溶液を得る。
実施例2.
オキソリニック酸45重量部、ジオクチルスルホサクシネートナトリウム塩 1.0重量部、ポリオキシエチレンポリスチリルエーテルホスフェートアミン塩4.0重量部、プロピレングリコール10.0重量部、ジメチルポリシロキサン 0.1重量部、及び残部にイオン交換水を加えて100重量部とし、湿式粉砕して40%ミルベースを製造した。40%ミルベース 25.00重量部、ジオクチルスルホサクシネートナトリウム塩 0.25重量部、ポリオキシエチレンポリスチリルエーテルホスフェートアミン塩 1.00重量部、プロピレングリコール 6.00重量部、ジメチルポリシロキサン 0.05重量部、1,2−ベンズイソチアゾリン−3−オン 0.15重量部、ヘテロポリサッカライド0.30重量部、および残部にイオン交換水を加えて100重量部とし、攪拌混合して10%の懸濁剤を得た。
【0011】
比較例1.
ケーソンWTPlus(ロームアンドハース製)14.3重量部、水85.7重量部を混合して、イソチアゾロン(イソチアゾロンは5−クロロ−2−メチル−4−イソチアゾリン−3−オン及び2−メチル−4−イソチアゾリン−3−オン混合物)を有効成分として約2%を含有する殺菌、殺藻効力を有する比較製剤1を得た。
比較例2.
所定量の水にカセイソーダ3重量部を溶かし、PBED(WSCP、Busan−77、バックマンラボラトリー製)6重量部を加え混合溶解し水を加えて100重量部とし、殺菌効力を有する比較製剤2を得た。
【0012】
試験例1.スフェロチリス菌及びズーグレア菌に対する増殖抑制効果試験(液体静置培養法)
PH9に調整したSPN液体培地(トリプトン0.5g、グリセリン1.0g、酵母エキス0.1g、イオン交換水1l)を96穴のセルウェルに200μLづつ分注した。スファエロチリス ナタンス(Sphaerotilis natans 、以下SPNと称する)、ズーグレア ラミゲラ(Zoogloea ramigera 、以下ZORと称する。)の凍結保存菌をそれぞれSPN液体培地で25℃にて、24時間培養した後、108cfu(colony forming unit 、生菌数)に調整した。この細菌懸濁液25μlとオキソリニック酸(予めジメチルスルホキシドに溶解し、水で希釈したもの)及び対照薬剤に所定濃度の10倍濃度に水希釈し、その25μLを96穴セルウェルに加え25℃にて48時間培養した。
培養後、濁度を目視により判断して、最少生育阻止濃度を検定した。結果を表1に示した。
【0013】
表1.最少生育阻止濃度(ppm)
−−−−−−−−−−−−−−−−−−−−
供試薬剤       SPN
−−−−−−−−−−−−−−−−−−−−
オキソリニック酸   1.25
−−−−−−−−−−−−−−−−−−−−
比較製剤1      0.313
比較製剤2     20
−−−−−−−−−−−−−−−−−−−−
【0014】
試験例2.イソチアゾロン耐性菌(現場採取菌)に対する増殖抑制効果試験(寒天平板培養法)
▲1▼イソチアゾロン劣効スライム菌の採取及び単離
一般細菌検査用MH培地(ブイヨン(栄研化学(株)製)21g、澱粉(溶性)1.5g、寒天15g、イオン交換水1l)を加温溶解し、イソチアゾロンを加えて9cmシャーレに分注し、5ppmのイソチアゾロンを含む平板培地を作成した。イソチアゾロン不効現場から採取したスライムの上澄みを、原液のまま及び5、10倍に希釈して、上記寒天平板培地に100μl塗布し、30℃にて24時間培養した。イソチアゾロン存在下で生育してきたコロニーを種類毎にイソチアゾロン入り培地の入ったスラント(斜面培地)に単離した。
【0015】
▲2▼イソチアゾロン劣効スライム菌に対する抗菌試験
上記単離菌をMH液体培地(ブイヨン21g、イオン交換水1l)にとり25℃にて24時間培養した。10cfuに調整した細菌懸濁液50μLを、予め上記製造例等に準じて製造した薬剤をオキソリニック酸が所定の濃度となるように混入した一般細菌検査用MH培地を流した平板培地(9cmシャーレ)に塗布し、30℃にて24時間培養後、コロニー数を数えた。
結果を表2に示した。無処理区を100とし、単純相対指数で示した。

Figure 2004115387
【0016】
表2.イソチアゾロン劣効スライム菌に対する抗菌試験
(無処理区対比コロニー指数)
−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−
供試薬剤  単離菌1. 単離菌2. 単離菌3. 対照スライム菌
−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−
製造例1    0     0     0      0
製造例2    0     0     5      0
−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−
比較製剤1 100   100   100      0
比較製剤2 100   100    90      0
−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−
無処理区  100   100   100    100
−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−
本発明のオキソリニック酸濃度は2ppm、比較製剤1のイソチアゾロンは2ppm、比較製剤2のPBED濃度は60ppmであり、対照スライム菌はイソチアゾロン感受性SPN菌(Sphaerotiris natans )を使用した。
【0017】
【発明の効果】
本発明のスライム抑制剤は、水処理剤として優れた抗菌力を有し、とりわけイソチアゾロンやPBED等の既存剤が効きにくくなったスライム細菌に対して有効であり、混合剤あるいは他の薬剤との前後(交互)使用によりスライム生成を効果的に抑制でき、クーリングタワー用冷却水、パルプ工程、潤滑油等に用いることにより、各々メンテナンス費用の削減、製品の品質向上、効率的なシステム運用等に貢献でき、スライムの生成が問題となる各産業分野に有用である。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a slime inhibitor such as industrial cooling water, papermaking process water in the pulp and paper industry, lubricating oil, metalworking oil and the like, and a method of using the same.
[0002]
[Prior art]
Oxolinic acid, which is an active ingredient of the present invention, is a known compound (for example, see Patent Document 1), and is a compound having an antibacterial activity. As a conventional method of use, its usefulness as a medical antibacterial agent is known. (For example, see Patent Document 2). Moreover, the use as a bacterial disease control agent for agriculture and horticulture is also known (for example, refer to Patent Document 3 and Non-Patent Document 1). It is described that a combination of several antibacterial agents including oxolinic acid and one of azole antifungal agents can be used as a useful seed disinfectant due to a synergistic effect (for example, see Patent Document 4). .). Also, it can be blended as a bactericidal component for various uses for industrial use. For example, antibacterial fibers (for example, see Patent Documents 5 and 6), antibacterial paper (for example, see Patent Document 7), antibacterial resins (for example, Reference 8)). However, its usefulness in situations where slime generated in industrial cooling water or the like and existing industrial antibacterial agents have become less effective has not been known.
[0003]
[Patent Document 1]
JP-B-43-959 (Page 4, Example 1, etc.)
[Patent Document 2]
JP-A-47-31998 (page 3, table)
[Patent Document 3]
JP-A-53-24028 (Pages 4-6, Tables 2-7)
[Patent Document 4]
JP-A-5-155718 (paragraph numbers 0017-0024, Tables 1 to 4, etc.)
[Patent Document 5]
JP-A-9-176966 (pages 3-4, Examples, etc.)
[Patent Document 6]
Japanese Patent Application Laid-Open No. 2000-86411 (Pages 3-4, Examples, etc.)
[Patent Document 7]
JP-A-9-217297 (pages 2-3, Examples, etc.)
[Patent Document 8]
JP-A-9-208408 (Pages 2-3, Examples, etc.)
[Non-patent document 1]
The Pesticide Manual, vol. 11, p. 915
[Problems to be solved by the invention]
Industrial cooling water, papermaking process water in the pulp and paper industry, lubricating oil, metalworking oil, and the like are often used continuously for a long time by continuous operation. Slime tends to be generated in such water and oils, resulting in industrial damage such as loss due to product deterioration and process loss due to overhaul of the system. Among the bacteria causing such slime, those that cannot achieve a sufficient inhibitory effect with existing industrial antibacterial agents and the like gradually become prioritized, and those that cannot be adequately controlled due to the emergence of resistant bacteria have emerged and become problematic. ing. The emergence of new inhibitors and slime control methods that can effectively control such slime is desired.
[0005]
[Means for Solving the Problems]
The present invention provides a slime inhibitor containing oxolinic acid or a salt thereof as an active ingredient, and a method for controlling slime by adding oxolinic acid or a salt thereof to water as an active ingredient.
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
The oxolinic acid used in the present invention is a known compound represented by the chemical name: 5-ethyl-5,8-dihydro-8-oxo [1,3] dioxolo [4,5-g] quinoline-7-carboxylic acid. Yes, The Pesticide Manual, Vol. 11, pp. 915, describes antibacterial agents for agricultural and horticultural use and properties related to safety.
When oxolinic acid is used as an active ingredient in the present invention, it may be a free acid, an arbitrary salt form, or a hydrate thereof in some cases. As the optional salt, for example, a metal salt such as a sodium salt, a potassium salt, a calcium salt, a magnesium salt, a zinc salt, and an aluminum salt, an ammonium salt, a pyridinium salt, an ethanolamine salt and the like are used.
[0007]
The effective use concentration of oxolinic acid may be 0.1 ppm or more in an aqueous system, and usually a range of 1 to 10 ppm is practical and economically appropriate. However, in order to obtain the effect in a short time, it is also effective to perform single injection at a high concentration of 10 to 1000 ppm.
As a method for charging into water, it is sufficient to process into a solution in which oxolinic acid is dissolved in an alkaline aqueous solution or an organic solvent, or into a wettable powder, a suspending agent, or a solid preparation whose dissolution is controlled, and then into water.
[0008]
The oxolinic acids or salts thereof of the present invention can be used alone or with one or more other slime inhibitors. Other slime inhibitors include isothiazolinone derivatives, quaternary ammonium salts, hydrazines, halonitro compounds, iodopropargyl derivatives, thiocyanate compounds, trihalomethylthio compounds, biguanide compounds, aldehydes, phenols, benzimidazole derivatives It is preferable to use existing slime inhibitors such as pyridine oxide, diphenyl ether and carboxylic acid.
It is also effective to treat the oxolinic acid or salts thereof of the present invention immediately before or after these slime inhibitors.
Other active ingredients for water treatment, for example, algicides, rust inhibitors, scale inhibitors, and the like can also be mixed and used.
[0009]
The slime inhibitor containing the oxolinic acid or a salt thereof according to the present invention is effective against the genus Sphaerotilis commonly found in open-circulation cooling water systems, and is also effective against the genus Escherichia such as Escherichia coli and the like. Staphylococcus aureus (Staphylococcus aureus), such as Staphylococcus (Staphylococcus spp., Pseudomonas aeruginosa (Pseudomonas aeruginosa), Pseudomonas (Pseudomonas) genus such as Pseudomonas fluorescens (Pseudomonas fluoresense), Proteus vulgaris (Proteus vulugaris) such as Proteus (Pro eus), Bacillus subtilis and other Bacillus genus, and Enterobacter aerogenes (Enterobacter aerogenes) and other types of bacteria such as Enterobacter. It also has an effect on these fungi for which the effects of existing drugs have been reduced.
In addition, the slime suppressant of the present invention can also be used as an additive in the pulp production process in addition to the above, and also in the field of lubricating oils, especially metal working oils.
[0010]
【Example】
Hereinafter, production examples of the slime inhibitor of the present invention and slime suppression effect test examples will be described, but the present application is not limited thereto.
Embodiment 1 FIG.
Water is added to 0.5 parts by weight of oxolinic acid and 5.0 parts by weight of monoethanolamine to make 100 parts by weight to obtain a uniform solution.
Embodiment 2. FIG.
Oxolinic acid 45 parts by weight, dioctyl sulfosuccinate sodium salt 1.0 part by weight, polyoxyethylene polystyryl ether phosphate amine salt 4.0 parts by weight, propylene glycol 10.0 parts by weight, dimethyl polysiloxane 0.1 parts by weight, Then, ion-exchanged water was added to the remainder to make up to 100 parts by weight, and the mixture was wet-pulverized to produce a 40% mill base. 40% mill base 25.00 parts by weight, dioctyl sulfosuccinate sodium salt 0.25 parts by weight, polyoxyethylene polystyryl ether phosphate amine salt 1.00 parts by weight, propylene glycol 6.00 parts by weight, dimethylpolysiloxane 0.05 Parts by weight, 0.15 parts by weight of 1,2-benzisothiazolin-3-one, 0.30 parts by weight of a heteropolysaccharide, and ion-exchanged water to the remaining parts to make up to 100 parts by weight. Agent was obtained.
[0011]
Comparative Example 1
A mixture of 14.3 parts by weight of Caisson WTPlus (manufactured by Rohm and Haas) and 85.7 parts by weight of water was mixed with isothiazolone (isothiazolone was 5-chloro-2-methyl-4-isothiazolin-3-one and 2-methyl-4. -Isothiazolin-3-one mixture) as an active ingredient to obtain a comparative preparation 1 having a bactericidal and algicidal effect containing about 2%.
Comparative Example 2.
Dissolve 3 parts by weight of sodium hydroxide in a predetermined amount of water, add 6 parts by weight of PBED (WSCP, Busan-77, manufactured by Bachman Laboratory), mix and dissolve, add water to make up to 100 parts by weight, and prepare Comparative Formulation 2 having a bactericidal effect. Obtained.
[0012]
Test Example 1 Growth inhibitory effect test on Spherotiris and Zooglare bacteria (Liquid static culture method)
The SPN liquid medium adjusted to PH9 (0.5 g of tryptone, 1.0 g of glycerin, 0.1 g of yeast extract, and 1 liter of ion-exchanged water) was dispensed into a 96-well cell well by 200 μL. After cryopreserved bacteria of Sphaerotilis natans (hereinafter, referred to as SPN) and Zoogloea ramigera (hereinafter, referred to as ZOR) are each cultured at 25 ° C. for 24 hours in an SPN liquid medium, 108 cfu (colony forming) , Viable cell count). 25 μl of this bacterial suspension, oxolinic acid (pre-dissolved in dimethyl sulfoxide and diluted with water) and a control drug were diluted with water to a concentration 10 times the predetermined concentration, and 25 μl thereof was added to a 96-well cell well and added at 25 ° C. Culture was performed for 48 hours.
After the cultivation, the turbidity was visually determined to determine the minimum growth inhibitory concentration. The results are shown in Table 1.
[0013]
Table 1. Minimum growth inhibitory concentration (ppm)
−−−−−−−−−−−−−−−−−−−−−−−
Reagent SPN
−−−−−−−−−−−−−−−−−−−−−−−
Oxolinic acid 1.25
−−−−−−−−−−−−−−−−−−−−−−−
Comparative preparation 1 0.313
Comparative preparation 2 20
−−−−−−−−−−−−−−−−−−−−−−−
[0014]
Test Example 2. Growth inhibitory effect test on isothiazolone-resistant bacteria (field-collected bacteria) (agar plate culture method)
{Circle around (1)} Collection and isolation of isothiazolone-inferior slime bacteria Addition of 21 g of MH medium for bronze test (manufactured by Eiken Chemical Co., Ltd.), 1.5 g of starch (soluble), 15 g of agar, 1 l of ion-exchanged water. The mixture was dissolved by heating, isothiazolone was added, and the mixture was dispensed into a 9 cm petri dish to prepare a plate medium containing 5 ppm of isothiazolone. The supernatant of the slime collected from the isothiazolone-ineffective site was used as a stock solution, diluted 5 to 10 times, applied to the agar plate medium in an amount of 100 μl, and cultured at 30 ° C. for 24 hours. Colonies that grew in the presence of isothiazolone were isolated for each type on a slant (slope medium) containing a medium containing isothiazolone.
[0015]
{Circle around (2)} Antibacterial test against isothiazolone-ineffective slime bacteria The above isolated bacteria were placed in an MH liquid medium (21 g of broth, 1 liter of ion-exchanged water) and cultured at 25 ° C. for 24 hours. A plate culture medium (9 cm) containing 50 μL of the bacterial suspension adjusted to 10 6 cfu and a MH culture medium for general bacterial test in which an oxolinic acid was previously mixed with a drug manufactured according to the above-mentioned manufacturing examples so that the concentration thereof became a predetermined concentration. After coating at 30 ° C. for 24 hours, the number of colonies was counted.
The results are shown in Table 2. The untreated plot was defined as 100 and represented by a simple relative index.
Figure 2004115387
[0016]
Table 2. Antibacterial test against isothiazolone inferior slime bacteria (colony index compared to untreated area)
−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−
Reagents Isolated bacteria 1. 1. Isolated bacteria 2. Isolated bacteria Control slime bacterium ----------------------------------------
Production Example 1 0 0 0 0
Production Example 2 0 0 5 0
−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−
Comparative preparation 1 100 100 100 0
Comparative preparation 2 100 100 90 0
−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−
Untreated area 100 100 100 100
−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−
The oxolinic acid concentration of the present invention was 2 ppm, the isothiazolone of Comparative Preparation 1 was 2 ppm, the PBED concentration of Comparative Preparation 2 was 60 ppm, and the control slime bacterium used was an isothiazolone-sensitive SPN bacterium (Sphaerotiris natans).
[0017]
【The invention's effect】
The slime inhibitor of the present invention has excellent antibacterial activity as a water treatment agent, and is particularly effective against slime bacteria in which existing agents, such as isothiazolone and PBED, have become less effective. Slime generation can be effectively suppressed by using before and after (alternate), and by using it for cooling tower cooling water, pulp process, lubricating oil, etc., each contributes to reduction of maintenance cost, improvement of product quality, efficient system operation, etc. It is useful in various industrial fields where slime generation is a problem.

Claims (3)

オキソリニック酸又はその塩類を含有することを特徴とするスライム抑制剤。A slime inhibitor containing oxolinic acid or a salt thereof. オキソリニック酸又はその塩類を水中に添加することによるスライム抑制方法。A slime control method by adding oxolinic acid or a salt thereof to water. オキソリニック酸の使用濃度が0.1〜1000ppmである請求項2記載のスライム抑制方法。The slime control method according to claim 2, wherein the concentration of oxolinic acid used is 0.1 to 1000 ppm.
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010173972A (en) * 2009-01-29 2010-08-12 Japan Enviro Chemicals Ltd Antimicrobial composition for industrial use
JP2011093840A (en) * 2009-10-29 2011-05-12 Japan Enviro Chemicals Ltd Industrial antimicrobial agent
JP2013253076A (en) * 2012-05-09 2013-12-19 Japan Enviro Chemicals Ltd Antiseptic agent composition
JP2014169267A (en) * 2013-02-06 2014-09-18 Japan Enviro Chemicals Ltd Industrial antimicrobial mildewproofing composition

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010173972A (en) * 2009-01-29 2010-08-12 Japan Enviro Chemicals Ltd Antimicrobial composition for industrial use
JP2011093840A (en) * 2009-10-29 2011-05-12 Japan Enviro Chemicals Ltd Industrial antimicrobial agent
JP2013253076A (en) * 2012-05-09 2013-12-19 Japan Enviro Chemicals Ltd Antiseptic agent composition
JP2014169267A (en) * 2013-02-06 2014-09-18 Japan Enviro Chemicals Ltd Industrial antimicrobial mildewproofing composition

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