JP4289836B2 - Anti-fungal composition - Google Patents
Anti-fungal composition Download PDFInfo
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- JP4289836B2 JP4289836B2 JP2002186492A JP2002186492A JP4289836B2 JP 4289836 B2 JP4289836 B2 JP 4289836B2 JP 2002186492 A JP2002186492 A JP 2002186492A JP 2002186492 A JP2002186492 A JP 2002186492A JP 4289836 B2 JP4289836 B2 JP 4289836B2
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- benzimidazole
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Description
【0001】
【発明の属する技術分野】
本発明は建築物の内外装に使用されるタイルや石材、大型陶板等の板状建材の板間にあって表面に露出している目地材、それもセメント系目地材料に対して、高温多湿環境下でもカビの生育を抑制するための抗カビ組成物に関するものである。
【0002】
【従来の技術及び発明が解決しようとする課題】
建築物の内外装に使用されるタイルや石材、大型陶板等の建材の目地部の材料としてセメント系のものが一般的に使用されているが、例えば浴室のような高温多湿環境下においては、表面にカビが生育し美観の低下や悪臭の発生を招くことがしばしば観察される。
【0003】
そこでセメント系目地材料におけるカビの発生を抑制するために抗カビ剤を配合することが検討されている。この目地材料に使用される抗カビ剤は、施工後の強アルカリ下で安定であることや、例えば浴室などのように水周りに使用される場合には高い耐水性も要求される。
【0004】
一般的な工業材料に使用される抗カビ剤としては、例えば5−クロロ−2−メチル−4−イソチアゾリン−3−オン、2−メチル−4−イソチアゾリン−3−オン、1,2−ベンズイソチアゾリン−3−オン、N−n−ブチル−1,2−ベンズイソチアゾリン−3−オン、2−n−オクチル−4−イソチアゾリン−3−オン、4,5−ジクロロ−2−n−オクチル−4−イソチアゾリン−3−オン、2−メチル−4,5−トリメチレン−4−イソチアゾリン−3−オンなどのイソチアゾリン系化合物、2−ブロモ−2−ニトロプロパン−1,3−ジオール、2,2−ジブロモ−2−ニトロエタノール、2,2−ジブロモ−3−ニトリロプロピオンアミド、1,2−ジブロモ−2,4−ジシアノブタン、ヘキサブロモジメチルスルホンなどの有機臭素系化合物、ホルムアルデヒド、グルタルアルデヒド、o−フタルアルデヒドなどのアルデヒド系化合物、3−メチル−4−イソプロピルフェノール、2−イソプロピル−5−メチルフェノール、o−フェニルフェノール、4−クロロ−3,5−ジメチルフェノール、2,4,4’−トリクロロ−2’−ヒドロキシジフェニルエーテル、4,4’−ジクロロ−2’−ヒドロキシジフェニルエーテルなどのフェノール系化合物、8−オキシキノリン、2,3,5,6−テトラクロロ−4−(メチルスルホニル)ピリジン、ビス(2−ピリジルチオ−1−オキシド)亜鉛、(2−ピリジルチオ−1−オキシド)ナトリウムなどのピリジン系化合物、N,N',N''−トリスヒドロキシエチルヘキサヒドロ−S−トリアジン、N,N',N''−トリスエチルヘキサヒドロ−S−トリアジンなどのトリアジン系化合物、3,4,4’−トリクロロカルバニリド、3−トリフルオロメチル−4,4’−ジクロロカルバニリドなどのアニリド系化合物、2−(チオシアノメチルチオ)ベンズチアゾールなどのチアゾール系化合物、2−(4’−チアゾリル)ベンズイミダゾール、2−ベンズイミダゾールカルバミン酸メチルなどのイミダゾール系化合物、2,4,5,6−テトラクロロイソフタロニトリル、5−クロロ−2,4,6−トリフルオロイソフタロニトリルなどのニトリル系化合物、4,5−ジクロロ−1,2−ジチオラン−3−オン、3,3,4,4−テトラクロロテトラヒドロチオフェン−1,1−ジオキシドなどの有機塩素系化合物、3−ヨード−2−プロピニルブチルカーバメート、ジヨードメチル−p−トリルスルホン、2,3,3−トリヨードアリルアルコール、p−クロロフェニル−3−ヨードプロパギルフォルマールなどの有機ヨード系化合物などが挙げられる。
【0005】
これら一般的な工業材料に使用される抗カビ剤のうち、多くのものは強アルカリ下での安定性に問題があったり持続性に乏しいという問題があり、セメントのような土木建築用材料に対しては適当ではない。
【0006】
強アルカリ下で安定性にすぐれ抗カビ性を有するものとして、特許3223520号の2,3,3−トリヨードアリルアルコールや、特許2586247号のジヨードメチル−p−トリルスルホンや3−ヨード−2−プロピニルブチルカーバメートなどの有機ヨード系化合物が提案されている。しかしこれら有機ヨード系化合物は、経時変化によって遊離ヨードが生じることによる着色の問題や、持続性の問題があった。特許第3146278号には、α−[2−(4−クロロフェニル)エチル]−α−(1,1−ジメチルエチル)−1H−1,2,4−トリアゾール−1−エタノールなどの有機窒素ハロゲン系化合物が提案されている。しかし、この有機窒素ハロゲン化合物は、変色や持続性の問題は少ないものの初期の抗カビ性がやや弱く、充分な抗カビ性を得るためには添加量が増えコストが割高になるという問題があった。
【0007】
【課題を解決するための手段】
本発明者はこのような課題を解決するため鋭意研究した結果、セメント系目地材料に対して、下記の一般式(1)で示される特定の化合物と2−(4’−チアゾリル)ベンズイミダゾールを含む抗カビ組成物を配合することで、変色等がなく長期にわたって安定で、高い抗カビ性とその持続性にすぐれること見出し本発明に至った。
一般式(1)
(式中、Rは水素原子もしくは炭素数1から4までの直鎖または分枝状のアルキル基を表す)
【0008】
一般式(1)で示される化合物として、Rがn−プロピル基である1−[[2−(2,4−ジクロロフェニル)−4−n−プロピル−1,3−ジオキソラン−2−イル]メチル]−1H−1,2,4−トリアゾールが好ましい。
【0009】
【発明の実施の形態】
本発明における抗カビ組成物が添加されるセメント系目地材料を使用する建材としては、陶磁器質タイル、大型陶板、セラミックタイル、石材、レンガなどが挙げられるが、これらの用途に限定されるものではない。また、大きさや形状についてもとくに制約があるわけではない。
【0010】
これらのセメント系目地材料は一般的に強アルカリ性を示すが、本発明の抗カビ組成物である下記の一般式(1)で示される特定の化合物と2−(4’−チアゾリル)ベンズイミダゾールを含む抗カビ組成物は、強アルカリ下でも安定であり長期間にわたり抗カビ効果を持続する。
一般式(1)
(式中、Rは水素原子もしくは炭素数1から4までの直鎖または分枝状のアルキル基を表す)
【0011】
一般式(1)で示される化合物として、Rがn−プロピル基である1−[[2−(2,4−ジクロロフェニル)−4−n−プロピル−1,3−ジオキソラン−2−イル]メチル]−1H−1,2,4−トリアゾールが好ましい。
【0012】
本発明の抗カビ組成物は、一般式(1)で示される特定の化合物と2−(4’−チアゾリル)ベンズイミダゾールを含む組成物をそのまま使用することもできるが、例えば、液剤、懸濁剤、粉剤、粒剤、水和剤などの公知の剤型に製剤化することによりセメント等の土木建築用材料に添加することもできる。通常この土木建築用材料は粉体で流通しており、施工時に水を加えて混錬するため土木建築用材料にあらかじめ混合しておくことを考えると粉剤に製剤化することが好ましい。
【0013】
粉剤として製剤する場合には、一般式(1)で表される特定の化合物が粉体であればそのまま使用することが可能であるが、一般式(1)のうちRの炭素数が大きくなると常温で液体となるため粉体化する必要がある場合には、例えばシリカのような公知の無機物質に担持させて粉体化することができる。このときの無機物質の量は一般式(1)で表される特定の化合物が担持されるに足りる量であれば差し支えなく、無機物質の種類およびその量については特に制限されない。
【0014】
本発明の抗カビ組成物には、一般式(1)で示される特定の化合物を含む組成物と2−(4’−チアゾリル)ベンズイミダゾールを含む組成物には、必要に応じて、増量剤、溶剤、紫外線吸収剤、撥水剤、滑剤などを配合することも可能である。
【0015】
本発明における一般式(1)で示される特定の化合物に、2−(4’−チアゾリル)ベンズイミダゾールを含む場合の配合比率は任意の割合で実施できるが、2−(4’−チアゾリル)ベンズイミダゾールが90重量%以下であることが好ましい。2−(4’−チアゾリル)ベンズイミダゾールの配合比率が90重量%を超えると、この化合物の抗カビスペクトルに偏りがあるため十分な抗カビ性を発揮できずカビが生育したり、セメント系目地材料が変色したり、持続性が低下する場合がある。
【0016】
本発明の抗カビ組成物の、セメント系目地材料への添加濃度は、0.001〜3重量%であり、好ましくは0.01〜1重量%である。この濃度未満では充分な抗カビ性を得ることができず、この濃度を超えると充分な抗カビ性は得られるもののコストがかかり過ぎて現実的ではない。
【0017】
【実施例】
本発明を実施例、試験例により詳しく説明するが、本発明がこれらによって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。
【0018】
実施例1〜4、比較例1〜4の抗カビ組成物を表1に示した。なお表中のTBZは2−(4’−チアゾリル)ベンズイミダゾールの略称であり、IPBCは3−ヨード−2−プロピニルブチルカーバメートの略称であり、テブコナゾールはα−[2−(4−クロロフェニル)エチル]−α−(1,1−ジメチルエチル)−1H−1,2,4−トリアゾール−1−エタノールの略称であり、BCMは2−ベンズイミダゾールカルバミン酸メチルの略称である。
【0019】
【表1】
*1) カープレックスXR(沈降性シリカ、塩野義製薬株式会社製)
【0020】
試験例1(試料の調製)
実施例1〜4、比較例1〜4の各抗カビ組成物を、白色の普通ポルトランドセメント40重量%、アルカリ金属ケイ酸塩水溶液(二酸化ケイ素 20%、酸化カリウム 25%、水 55%からなる水溶液) 25重量%、炭酸カルシウム20重量%、酸化チタン粉末 7%、タルク 1重量%、珪砂 5重量%、アクリル酸エステル粉末 2重量%の割合で混合したものに添加し、直径約30mm、厚さ約5mmの円盤形状に成形してデシケーターに入れ、このデシケーターを30℃の恒温槽に3日間放置して養生・固化させた。固化後、デシケーター内の空気を二酸化炭素に置換することで、試料の強アルカリを中和した。
【0021】
試験例2(耐水試験)
抗カビ剤の持続性を確認するために、試験例1で調製した試料を90℃の温水中に16時間浸漬することで耐水試験とした。この耐水試験は養生・固化後に行い、耐水試験試験の後に二酸化炭素による中和処理を行った。
【0022】
試験例3(抗カビ性試験)
オートクレーブで滅菌したポテトデキストロース寒天培地の溶解物15mlを、直径90mmの滅菌シャーレに流しポテトデキストロース寒天平板培地を調製した。この平板培地の中央に、試験例1で調製した試料と、これを試験例2で耐水試験を行い、この耐水試験後に中和処理を行った試料それぞれを置き、この上から5種類のカビの混合胞子懸濁液(Aspergillus niger IFO 6342、Penicillium funiculosum IFO 6352、Cladosporium cladosporioides IFO 6348、Aureobasidium pullulans IFO 6353、Alternaria alternata IFO 31805)を振りかけ26℃で培養して経時的に試料上のカビの生育状況を観察した。なお、カビの胞子懸濁液には、グルコースとポリペプトンをそれぞれ1%溶解させたものを用いた。
【0023】
抗カビ性試験の結果を表2に示す。判定基準は次の通りである。この結果からわかるように、実施例の抗カビ組成物は、耐水試験後も含めて良好な抗カビ活性を示した。これに対して、比較例1、3、4は抗カビスペクトルの問題から充分な抗カビ性が認められず、比較例2は初期の抗カビ性にはすぐれるものの耐水試験後の持続性が認めらなかった。
0:試料上にカビの生育が認められない。
1:試料上のカビの生育面積は1/3を超えない。
2:試料上のカビの生育面積は1/3を超える。
【0024】
【表2】
【0025】
試験例4(変色試験)
試験例1で養生・固化させた試料に、市販の塩素系漂白剤(カビキラー、ジョンソン株式会社製)もしくは中性洗剤(バスマジックリン、花王株式会社製)を塗布して1時間放置後、充分水洗したときの試料の変色程度を観察した。
【0026】
変色試験の結果を表3に示す。判定基準は次の通りである。この結果からわかるように、実施例の抗カビ組成物は、塩素系漂白剤、中性洗剤ともに変色はほとんど認められなかった。
○:試料の表面はほとんど変色が認められない。
×:試料の表面は明らかな変色が認められる。
【0027】
【表3】
【0028】
【発明の効果】
以上述べたように本発明の抗カビ組成物をセメント系目地材料に添加することにより、変色の懸念が少なく初期効果および持続性にすぐれた抗カビ性を付与することができる。したがって、この材料の表面にカビが生育し美観の低下や悪臭発生を回避することが長期間にわたって可能である。[0001]
BACKGROUND OF THE INVENTION
The present invention is a joint material that is exposed on the surface between tiles, stones, large ceramic plates, etc. used for interior and exterior of buildings, and is exposed to the surface of cement-based joint materials. However, the present invention relates to an antifungal composition for suppressing mold growth.
[0002]
[Prior art and problems to be solved by the invention]
Cement-based materials are commonly used as joint materials for building materials such as tiles, stones, and large ceramic plates used for the interior and exterior of buildings, but in high-temperature and high-humidity environments such as bathrooms, It is often observed that mold grows on the surface, leading to a decrease in aesthetics and the generation of odors.
[0003]
Then, in order to suppress the generation | occurrence | production of the mold | fungi in a cement type joint material, mix | blending an antifungal agent is examined. The antifungal agent used for this joint material is required to be stable under strong alkali after construction, and to have high water resistance when used around water such as in a bathroom.
[0004]
Examples of the antifungal agent used for general industrial materials include 5-chloro-2-methyl-4-isothiazolin-3-one, 2-methyl-4-isothiazolin-3-one, and 1,2-benzisothiazoline. -3-one, Nn-butyl-1,2-benzisothiazolin-3-one, 2-n-octyl-4-isothiazolin-3-one, 4,5-dichloro-2-n-octyl-4- Isothiazoline compounds such as isothiazoline-3-one, 2-methyl-4,5-trimethylene-4-isothiazolin-3-one, 2-bromo-2-nitropropane-1,3-diol, 2,2-dibromo- Such as 2-nitroethanol, 2,2-dibromo-3-nitrilopropionamide, 1,2-dibromo-2,4-dicyanobutane, hexabromodimethylsulfone, etc. Bromine compounds, aldehyde compounds such as formaldehyde, glutaraldehyde, o-phthalaldehyde, 3-methyl-4-isopropylphenol, 2-isopropyl-5-methylphenol, o-phenylphenol, 4-chloro-3,5- Phenolic compounds such as dimethylphenol, 2,4,4′-trichloro-2′-hydroxydiphenyl ether, 4,4′-dichloro-2′-hydroxydiphenyl ether, 8-oxyquinoline, 2,3,5,6-tetra Pyridine compounds such as chloro-4- (methylsulfonyl) pyridine, bis (2-pyridylthio-1-oxide) zinc, (2-pyridylthio-1-oxide) sodium, N, N ′, N ″ -trishydroxyethyl Hexahydro-S-triazine, N, N ′, N ″ -Triseth Triazine compounds such as hexahydro-S-triazine, anilide compounds such as 3,4,4′-trichlorocarbanilide, 3-trifluoromethyl-4,4′-dichlorocarbanilide, 2- (thiocyanomethylthio ) Thiazole compounds such as benzthiazole, imidazole compounds such as 2- (4′-thiazolyl) benzimidazole, methyl 2-benzimidazolecarbamate, 2,4,5,6-tetrachloroisophthalonitrile, 5-chloro Nitrile compounds such as 2,4,6-trifluoroisophthalonitrile, 4,5-dichloro-1,2-dithiolane-3-one, 3,3,4,4-tetrachlorotetrahydrothiophene-1,1 -Organochlorine compounds such as dioxide, 3-iodo-2-propynylbutylcarbamate, di Domechiru -p- tolyl sulfone, 2,3,3-triiodo allyl alcohol, and organic iodine compounds such as p- chlorophenyl-3-iodopropargyl formal and the like.
[0005]
Of these anti-fungal agents used in general industrial materials, many have problems with stability or poor sustainability under strong alkali. It is not appropriate for this.
[0006]
Patents 2,323,520, 2,3,3-triiodoallyl alcohol, and Japanese Patent 2,586,247, diiodomethyl-p-tolylsulfone and 3-iodo-2-propynyl, have excellent stability and antifungal properties under strong alkali. Organic iodine compounds such as butyl carbamate have been proposed. However, these organic iodine compounds have a problem of coloring due to the generation of free iodine due to changes over time and a problem of durability. Japanese Patent No. 3146278 includes organic nitrogen halogen systems such as α- [2- (4-chlorophenyl) ethyl] -α- (1,1-dimethylethyl) -1H-1,2,4-triazole-1-ethanol. Compounds have been proposed. However, although this organic nitrogen halogen compound has few problems of discoloration and sustainability, the initial antifungal property is somewhat weak, and in order to obtain sufficient antifungal property, there is a problem that the amount of addition increases and the cost becomes high. It was.
[0007]
[Means for Solving the Problems]
As a result of diligent research to solve such problems, the present inventors have found that a specific compound represented by the following general formula (1) and 2- (4′-thiazolyl) benzimidazole are added to a cement joint material. By blending the antifungal composition containing it, it was found that there was no discoloration and the like, and it was stable for a long period of time, and was excellent in high antifungal properties and its sustainability.
General formula (1)
(In the formula, R represents a hydrogen atom or a linear or branched alkyl group having 1 to 4 carbon atoms)
[0008]
As the compound represented by the general formula (1), 1-[[2- (2,4-dichlorophenyl) -4-n-propyl-1,3-dioxolan-2-yl] methyl wherein R is an n-propyl group ] -1H-1,2,4-triazole is preferred.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Examples of the building material using the cement-based joint material to which the antifungal composition of the present invention is added include ceramic tiles, large ceramic plates, ceramic tiles, stones, bricks, etc., but are not limited to these applications. Absent. Also, there are no particular restrictions on the size and shape.
[0010]
Although these cement-type joint materials generally show strong alkalinity, a specific compound represented by the following general formula (1) and 2- (4′-thiazolyl) benzimidazole which are antifungal compositions of the present invention are used. The contained antifungal composition is stable even under strong alkali and maintains the antifungal effect over a long period of time.
General formula (1)
(In the formula, R represents a hydrogen atom or a linear or branched alkyl group having 1 to 4 carbon atoms)
[0011]
As the compound represented by the general formula (1), 1-[[2- (2,4-dichlorophenyl) -4-n-propyl-1,3-dioxolan-2-yl] methyl wherein R is an n-propyl group ] -1H-1,2,4-triazole is preferred.
[0012]
As the antifungal composition of the present invention, a composition containing the specific compound represented by the general formula (1) and 2- (4′-thiazolyl) benzimidazole can be used as it is. It can also be added to civil engineering and building materials such as cement by formulating into known dosage forms such as powders, powders, granules and wettable powders. Normally, this civil engineering and construction material is distributed in powder form, and since it is kneaded by adding water during construction, it is preferable to formulate it into a powder in consideration of mixing with the civil engineering and building material in advance.
[0013]
When formulated as a powder, if the specific compound represented by the general formula (1) is a powder, it can be used as it is, but if the carbon number of R in the general formula (1) increases, When it needs to be pulverized because it becomes liquid at normal temperature, it can be pulverized by supporting it on a known inorganic substance such as silica. The amount of the inorganic substance at this time is not particularly limited as long as the specific compound represented by the general formula (1) is supported, and the kind and amount of the inorganic substance are not particularly limited.
[0014]
In the antifungal composition of the present invention, the composition containing the specific compound represented by the general formula (1) and the composition containing 2- (4′-thiazolyl) benzimidazole may be used as a bulking agent. Solvents, ultraviolet absorbers, water repellents, lubricants and the like can also be blended.
[0015]
The compounding ratio in the case where 2- (4′-thiazolyl) benzimidazole is contained in the specific compound represented by the general formula (1) in the present invention can be carried out at any ratio, but 2- (4′-thiazolyl) benz. It is preferable that imidazole is 90 weight% or less. If the blending ratio of 2- (4′-thiazolyl) benzimidazole exceeds 90% by weight, the antifungal spectrum of this compound is biased, so that it cannot exhibit sufficient antifungal properties and grows mold, The material may change color or the durability may decrease.
[0016]
The additive concentration of the antifungal composition of the present invention to the cement joint material is 0.001 to 3% by weight, preferably 0.01 to 1% by weight. If it is less than this concentration, sufficient antifungal properties cannot be obtained. If this concentration is exceeded, sufficient antifungal properties can be obtained, but it is too costly to be realistic.
[0017]
【Example】
The present invention will be described in detail with reference to examples and test examples, but the present invention is not limited thereto. The blending ratios shown below are all by weight.
[0018]
The antifungal compositions of Examples 1 to 4 and Comparative Examples 1 to 4 are shown in Table 1. In the table, TBZ is an abbreviation for 2- (4′-thiazolyl) benzimidazole, IPBC is an abbreviation for 3-iodo-2-propynylbutylcarbamate, and tebuconazole is α- [2- (4-chlorophenyl) ethyl. ] -Α- (1,1-dimethylethyl) -1H-1,2,4-triazole-1-ethanol, BCM is an abbreviation for methyl 2-benzimidazole carbamate.
[0019]
[Table 1]
* 1) Carplex XR (Sedimentable silica, manufactured by Shionogi & Co., Ltd.)
[0020]
Test Example 1 (Sample preparation)
Each of the antifungal compositions of Examples 1 to 4 and Comparative Examples 1 to 4 is composed of 40% by weight of white ordinary Portland cement, an aqueous alkali metal silicate solution (20% silicon dioxide, 25% potassium oxide, and 55% water). Aqueous solution) 25% by weight, calcium carbonate 20% by weight, titanium oxide powder 7%, talc 1% by weight, silica sand 5% by weight, acrylic acid ester powder 2% by weight, added to the mixture, diameter about 30 mm, thickness It was molded into a disc shape of about 5 mm and placed in a desiccator, and this desiccator was left in a thermostatic bath at 30 ° C. for 3 days to be cured and solidified. After solidification, the strong alkali of the sample was neutralized by replacing the air in the desiccator with carbon dioxide.
[0021]
Test example 2 (water resistance test)
In order to confirm the sustainability of the antifungal agent, the sample prepared in Test Example 1 was immersed in warm water at 90 ° C. for 16 hours to obtain a water resistance test. This water resistance test was performed after curing and solidification, and after the water resistance test, neutralization treatment with carbon dioxide was performed.
[0022]
Test Example 3 (Antifungal test)
A potato dextrose agar plate medium was prepared by pouring 15 ml of lysate of potato dextrose agar medium sterilized by autoclave into a sterile petri dish having a diameter of 90 mm. In the center of this flat plate medium, the sample prepared in Test Example 1 and the water resistance test were performed in Test Example 2, and each sample subjected to neutralization treatment after this water resistance test was placed. A mixed spore suspension (Aspergillus niger IFO 6342, Penicillium funiculosum IFO 6352, Cladosporidium clasporoidoids IFO 6348, and Aureobasidium pullulans IFO 6353) Observed. The fungal spore suspension was prepared by dissolving 1% each of glucose and polypeptone.
[0023]
The results of the antifungal test are shown in Table 2. Judgment criteria are as follows. As can be seen from the results, the antifungal compositions of the examples exhibited good antifungal activity even after the water resistance test. On the other hand, Comparative Examples 1, 3, and 4 did not show sufficient antifungal properties due to the problem of antifungal spectrum, and Comparative Example 2 was excellent in the initial antifungal properties, but sustained after water resistance test. Not recognized.
0: No mold growth was observed on the sample.
1: The growth area of mold on the sample does not exceed 1/3.
2: The growth area of mold on the sample exceeds 1/3.
[0024]
[Table 2]
[0025]
Test example 4 (discoloration test)
Apply a commercially available chlorine bleach (mold killer, manufactured by Johnson Co., Ltd.) or neutral detergent (Bath Magiclin, manufactured by Kao Co., Ltd.) to the sample cured and solidified in Test Example 1 and leave it for 1 hour. The degree of discoloration of the sample when washed with water was observed.
[0026]
The results of the discoloration test are shown in Table 3. Judgment criteria are as follows. As can be seen from the results, the anti-fungal compositions of the examples hardly showed any discoloration in both the chlorine bleach and the neutral detergent.
○: Almost no discoloration is observed on the surface of the sample.
X: Clear discoloration is recognized on the surface of the sample.
[0027]
[Table 3]
[0028]
【The invention's effect】
As described above, by adding the antifungal composition of the present invention to the cement joint material, it is possible to impart antifungal properties with less initial discoloration and excellent sustainability with less fear of discoloration. Therefore, it is possible for a long period of time to prevent mold from growing on the surface of this material and avoiding the deterioration of aesthetics and the generation of malodors.
Claims (3)
(式中、Rは水素原子もしくは炭素数1から4までの直鎖または分枝状のアルキル基を表す)で示される化合物と2−(4’−チアゾリル)ベンズイミダゾールを配合することを特徴とするセメント系目地用抗カビ組成物。General formula (1)
(Wherein R represents a hydrogen atom or a linear or branched alkyl group having 1 to 4 carbon atoms) and 2- (4′-thiazolyl) benzimidazole are blended. An anti-fungal composition for cement joints.
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