JP2728238B2 - Blue algae / lichen remover and method for removing blue algae / lichen from concrete objects - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cyanobacteria / lichen removing agent and a method for removing cyanobacteria / lichen from concrete objects.

[0002]

2. Description of the Related Art The present inventor describes the surface, peripheral surface, etc. of concrete structures, articles, stone statues, stone statues, archeological sites, tiles, objects, etc. (described on the concrete surface). As for the cause of stains such as color unevenness and discoloration, the following has been found from the results of research and experiments conducted over time. That is, fine particles such as dust and exhaust gas contained in rain adhere to the concrete surface. Using these fine particles as a nutrient source, microorganisms such as mold grow. Some of them will eventually die and carbonize to black stains. Organisms that attach to and propagate on the concrete surface include fungi (molds), algae, lichens, and moss plants. In addition, rust from the cracks in concrete, etc., rust from the protrusions,
There is precipitation of white carbonate called efflorescence.

[0003] Among the above-mentioned color unevenness and discoloration, dirt on the concrete surface is described in more detail, and the following investigation results have been found. (1) In the external visual discoloration survey,
Color near black is 7 in area of dam management office and retaining wall.
It was 5.0% or more, and it was found that there were many discoloration types in the high section, but a color close to black was the basis.
(2) It was found that the black adhering substance (blackish brown visually) adhering to the concrete surface was an organic substance.
(3) Those that grow intensively on black deposits are blue-green algae based on the results of the analysis, which include lichens Daidaigoke, Fischiera melancula (Mukadegotake) and Iwaurokogoke (Anaibogoke), and mosses such as moss. It turned out to be a hybrid.

[0004] Recently, as a simple method for removing dirt on the concrete surface, for example, there is the following peel seal method. That is, there is a method in which a release agent is applied to the surface, and at the stage where the release agent is changed to a release seal generated after the surface layer is cured, the surface seal is removed together with the release of the release seal. Has been offered to.

[0005] Algae which are common to the above-mentioned surface stain remover,
The following references are cited as prior art techniques for removing mold and the like. (1) There is a coating composition for algae prevention described in JP-A-63-202677. According to the present invention, the cationic surfactant of the component is 5 to 20 parts by weight, and the component is 0.1 to 100 parts by weight of the solid content of the resin emulsion of the component.
1 to 10 parts by weight, 0 to 7 parts by weight of an organic acid of a component, 0 to 15 parts by weight of a plasticizer of a component, 0 to 50 parts by weight of a nonionic surfactant and / or an amphoteric surfactant of a component. There is a configuration in which an anti-algae film is formed on the surface.
(2) There is an algae removing agent and an algae removing method described in JP-A-2-225401. The present invention is characterized by comprising an algicidal component and a heat retaining component, and is configured to adhere to the surface by a coating or spraying means to remove algae. (3)
There are an anti-algal fungicide described in JP-A-2-233603 and a coating composition containing the same. The present invention
A composition containing 5,6-tetrachloromethylsulfonylpyridine and iodopropargyl butyl carpamate as active ingredients, which adhere to the surface by coating or spraying means to prevent the generation of algae and mold for a long time. It is characterized by.

[0006]

The peel seal system outlined above is certainly considered beneficial in one aspect. However, there are problems such as the necessity of a peeling operation each time, the trouble based on the peeling operation, and the problem of discarding the peeled peeled seal has not been solved.

On the other hand, the invention based on each of the above-mentioned documents is mainly based on a paint composition, so that it can be applied to a certain concrete structure or the like, but the field of application is limited or the removal effect is not sufficient. There are problems such as that, and it is only a one-sided improvement. Therefore, in the object of the present invention, for example, a sufficient effect can be achieved with respect to lichen removal of a concrete surface having a curved surface and multiple surfaces, such as appearance, shape preservation, arts and crafts, stone statues, stone buddhas, archeological sites, and the like. That is not the case. In addition, there is a problem that it is not sufficient to cope with cases where colored paint cannot be used depending on the article to be processed.

[0008]

SUMMARY OF THE INVENTION In view of the above, the present invention can be used for various kinds of objects to be treated, and is intended to suppress the growth of blue-green algae and lichens to kill them.・ Provide lichen remover.

That is, the cyanobacteria / lichen removing agent of the present invention comprises:
As a commercial product of usnic acid and a usnic acid solvent, for example, an alkylene oxide adduct of a lower alcohol, a trade name of Tetraguard (Nippon Cement Co., Ltd.) is used as an active ingredient.

Further, the present invention is to suppress the growth of cyanobacteria and lichens to kill them, and to be versatile (available in a wide range).
The present invention provides a method for removing blue-green algae and lichens on the concrete surface described below for the purpose of providing an effective method of killing.

That is, the method for removing cyanobacteria and lichens from concrete surfaces according to the present invention includes the use of usnic acid and a solvent of usnic acid, as well as anti-algal agents such as irgalol, DCMU (Hokuko Sangyo Co., Ltd.) and fungicides. Produce a cyanobacteria / lichen remover composed of marine side and Nopcoside (San Nopco Co., Ltd.) as active ingredients, apply the cyanobacteria / lichen remover to the concrete surface, spray,
The method is provided by spraying or other methods, and the cyanobacteria / lichens are killed by utilizing the cyanobacterial / lichen growth suppressing power of the usnic acid.

[0012]

[Action]

(1) Results of observation of lichen and cyanobacterial epiphytes in the city center A test piece (smooth: installed on the rooftop of a building in Tokyo in August 1990 to investigate the invasion and growth process of lichens Observations were made with a stereoscopic microscope and a scanning electron microscope on the decorative tile and concrete coated with a coating film, rough surface: concrete piece). On concrete piece, Heisei 4
The growth of lichen of Iwaurokogoke was confirmed for the first time in May. After that, the lichen population increased rapidly (1cm
About 50 individuals per ² ). Of course, it doesn't grow as tightly as the concrete in the building, but it's already spread over the whole block. From the observations so far, it has been found that if new concrete buildings are made in Tokyo, iwakogoke and sumiibogoke will appear in 5 to 6 years. In other words, when the building is viewed from a distance, the surface of the building is visually recognized as concrete soil in 5 to 6 years.

(2) The observation results of the effects of usnic acid and photosynthesis on lichens will be described.

(A) Usnic acid and usnic acid solvent, for example, tetragard (for water-repellent and water-absorbing preventive effect), and as algicide, for example, irgalol, DCMU (for antialgal effect) and fungicide, for example, marine side,,
Two examples of an evaluation experiment of an industrial material (a cyanobacteria / lichen remover) containing nopcoside (antifungal effect) as an active ingredient will be described.

* As an example, the results of an experiment on the roof of a certain research laboratory will be described in detail. Prior to the application of the industrial materials, the lichens growing on the concrete surface were lichenella and iwakogoke, and blue-green algae were superior to the experimental surface. In the situation after the application of the cyanobacteria / lichen remover, a visual inspection about 8 months after the application of the cyanobacteria / lichen remover confirmed that the lichens of Likinella, Iwaurokogoke and cyanobacteria were killed. The change (bleaching) on the experimental surface was visually observed about 4 months after the application. From this experiment, the material selected as the soil removal material has the ability to remove lichens and blue-green algae that grow on the concrete surface even if the location changes (even if the lichens growing are different). It could be confirmed.

* As two examples, the results of an experiment at a certain company dam will be described in detail. Prior to the application of the cyanobacteria / lichen remover, those that had grown on the concrete surface in the high-rail area were lichens such as Daidaigooke, Fischiela melancula, Iwaurokogoke,
The gem moss was confirmed as a moss in Feoffee Kiera, and the symbiosis of cyanobacteria was also confirmed. In addition, the retaining wall part is mainly blue-green algae and slightly lichen as lichen,
Gingoke was confirmed as moss. In the situation after the application of the cyanobacteria / lichen remover, a visual inspection about 2 months after the application of the cyanobacteria / lichen remover revealed that the lichens growing in the column had changed (lichen withering, The area around the vessel also withered, etc.) was confirmed. In addition, no change was observed in the retaining wall portion before the application of the industrial material. This experiment shows that the material selected as the soil removal material has a large removal effect when lichen is preferentially present. In addition, from the results of the small-scale experiments conducted in 1992,
Since it has been recognized that it is also effective for cyanobacteria,
It is thought that there is a rate of drug effect by plants.

(A) Considering the above experimental results comprehensively, usnic acid, a substance present in lichen,
It has been confirmed from experimental results or field tests that the growth of lichens is suppressed (inhibited). Therefore, in the lichens growing on the dam, for example, Iwaurogoke (Endophalon spp.), Daidaigoke (Daidaigoke), Kofkisilomukadegooke, Fischiela melancula, and Fischielanigricans (Mukadegooke) grow with usnic acid. Suppression (inhibition) results are known. In recent culture experiments, it was found that there was a result of suppressing and killing the growth, and the above explanation was confirmed.

(C) Photosynthesis Lichens are known to grow by photosynthesis. An experiment was conducted using a cyanobacteria and lichen remover and a commercially available cold gauze to see if the concrete surface dirt can be removed by preventing this photocompatibility. Here, the used cold gauze was 1.24 m / m in mesh and light shielding (light shielding ratio 51
%, A porosity of 68%, black) were folded in two and placed on the retaining wall / railway (top of the embankment).
The results of the visual observation about three months after the installation and about 16 months after the installation are as follows. That is, it is presumed from the results of the experiment that the cold gauze has an effect of killing lichens and cyanobacteria.

[0019]

EXAMPLES Hereinafter, an example of the present invention will be described, but the present invention is not limited to this example.

A. Experimental method Investigate the current situation of lichens on the rooftop and dam of a certain research institute to understand the growth of lichens. For the selection of each experiment site and the method of applying the cyanobacteria / lichen remover, see CT-1 Usnic acid + Usnic acid solvent CT-2 Usnic acid + Usnic acid solvent + Algae inhibitor CT-3 Usnic acid + Usnic acid Perform the combination of solvent + anti-algal agent + fungicide. The application was performed on a vertical surface, and the usage rate of usnic acid or other industrial materials with respect to the usage rate of usnic acid solvent is shown in Table 1 by the weight ratio of usnic acid or other industrial materials used to the usage amount of usnic acid solvent.
The usnic acid solvent is, for example, a transparent paint (transparent material) such as an emulsion paint, and the same opaque paint (opaque material). For example, in the case of a concrete stone statue, stone Buddha, archeological site, tile, etc., It is preferable to use a transparent paint (not limited). In addition, regarding the application of cyanobacteria / lichen remover, the present conditions of the application area (based on the area of 15 cm square) and the application method (including brushing method, spraying method, spraying method, etc.) were investigated. Performed in a more appropriate manner.

Table 1 Usnic acid solvent / usnic acid, other industrial materials usage rate and experimental case

A. Follow-up Survey Timing and Observation Details The follow-up survey timing and observation details after applying the selected cyanobacteria / lichen remover are as shown below.

Table 2 Follow-up survey time and observation contents

Test Example 1 (2) A typical example in which the cyanobacteria / lichen remover created by the above-described formulation is applied to the retaining wall and the railing, respectively, is shown.

First, at the retaining wall, as shown in FIG.
The above-mentioned CT-1 to CT-3 to the retaining wall are respectively 1-1.
The position of the application 2 of each cyanobacteria / lichen removing agent 1 is shown as ~ 1-3, 2-1 ~ 2-3, or 3-1 ~ 3-3. 3 shows the situation four months after application, FIG. 4 shows the situation eight months after application, and FIG. 5 shows the situation sixteen months after application, respectively. The aforementioned CT-1
It was found that the cyanobacteria / lichen remover 1 of ~ CT-3 exhibited an effect. Therefore, FIGS. 6 and 7 show the CT-
6 shows the results of a situation test in which No. 1 was applied, and FIG. 6 shows the status before application, in which cyanobacteria 3 such as ricinella and Iwaurokogoke 3 and lichen 4 were used.
Can be confirmed. On the other hand, FIG. 7 shows a situation explaining the secular change four months after the application, and the disappearance of the lichen 4 is observed. 8 and 9 show the results of a situation test in which the above-mentioned CT-2 was applied 2, and FIG. 8 shows the growth of cyanobacteria 3 such as ricinella and Iwaurokogoke before application. On the other hand, FIG. 9 shows a situation explaining the secular change four months after the application, and the disappearance of the lichen 4 is observed. 10 and 11 show the results of a situation test in which the above-mentioned CT-3 was applied 2, and FIG. 10 shows that the growth of blue-green algae 3 such as ricinella and Iwaurokogoke was observed before application. On the other hand, FIG.
Reference numeral 1 denotes a situation explaining the secular change four months after application, and the disappearance of the lichen 4 has been observed.

Table 3 shows the situation after the application of the cyanobacteria / lichen remover 1, that is, the result of a visual inspection by an expert about 2 to 8 months after the application of the cyanobacteria / lichen remover 1. As shown in Table 4, the application status of the cyanobacteria / lichen remover 1 is shown in FIGS. 1 and 2 described above. FIGS. 3 to 1 show typical changes over time after the application of the cyanobacteria / lichen remover 1.
It is shown in FIG. The visual inspection position was determined by dividing the coverage per 1 cm ² on the upper side of the experimental surface into left and right, and because each industrial material flowed below the experimental surface, the ripple effect of cyanobacteria and lichen remover was considered. The coverage per 1 cm ² below the experimental surface was also divided into left and right and investigated. The reason why the visual inspection area changed before (7 cm ² ) and after application (1 cm ² ) of the cyanobacteria / lichen remover was to improve the accuracy of the visual inspection method in the follow-up survey. In addition, FIG. 3 shows that the survey area is not the same as described above in the situation about 4 months after the application of the cyanobacteria / lichen remover 1, and thus the comparison is not directly made, but the growing lichen 4 is the same. Was
The coverage of the lichen 4 was slightly lower. However, the bleaching effect accompanying the death of the lichen 4 could not be seen. FIG. 4 shows about 4 hours after applying the cyanobacteria / lichen removal agent 1.
In a monthly visual inspection, a change was observed on the surface on which the blue-green algae / lichen remover 1 was applied, and a bleaching effect accompanying the death of the lichen 4 was observed. Further, FIG. 5 shows that approximately 8 after the application of the cyanobacteria / lichen remover 1
Monthly visual inspection showed that the ricinella and Iwaurokogoke grown on the concrete surface had disappeared or decreased, and the effect of the applied material was clearly observed.

Also, about 2 months after the application of the cyanobacteria / lichen remover 1 and about 2 months after the application of the cyanobacteria / lichen remover 1
The months are shown in Tables 3-5.

Table 3

Table 4

Table 5

12 to 25 show the application 2 of the CT-1 to CT-3 cyanobacteria / lichen removing agent 1 to the railing section and the subsequent process. But first,
FIG. 12 and FIG. 13 show the position of the application 2 on the high section. FIG. 14 shows the results of a situation test in which the above-mentioned CT-1 was applied 2, and FIG. 14 shows that the lichen 4 of the Daidai-moss and the growth of candlesticks were observed in the situation after the application. However, it has been confirmed that the lichen 4 of the Daidai-ke moss, the candle, and the like have disappeared at the position of the application 2 and the lower portion thereof as in the process of three months in FIG. 15 and 16 months in FIG. . 17 to 19 show the results of a situation test in which the above-mentioned CT-2 was applied 2. In FIG. 17, the growth of lichen 4 of the Daidai-moss and candles in the situation after the application were confirmed. However, age 3 in FIG.
19 and the aging 16 months in FIG.
It has been confirmed that the lichen 4 of the Daidaigo moss, the candle moss, and the like have disappeared at the position shown below and below it. 20 to 22 show the results of a situation test in which the above-mentioned CT-3 was applied 2. FIG. 20 shows the growth of the lichen 4 and the candle moss of Daitai moss in the situation after application. However, it has been confirmed that the lichen 4 of the Daitai moss, the candlestick, and the like have disappeared at the position of the application 2 and the lower part thereof as in the process of 3 months in FIG. 21 and 16 months in FIG. . Note that FIG.
FIG. 25 to FIG. 25 are diagrams showing the growth status of the blue-green algae 3 in the untreated high section at the time of the above-mentioned investigation.

Here, the cyanobacteria / lichen remover 1 application 2
The previous situation is shown in FIGS. Further, the evaluation experiment of usnic acid at this dam was performed on the upper rail section shown in FIG. 12 and the retaining wall section not shown next to the road. Investigation of the epiphytic state of the plants growing on the concrete surface before the application of the cyanobacteria / lichen remover 1 in the above-mentioned column was conducted by experts. As a result, in the balustrades, lichen 4 can be identified as Daidaigoke, Fischiella melancula, Iwaurokogoke, and Feisow Kiera, and moss as Gingoke.
It was confirmed that cyanobacteria 3 coexist. The characteristic of the plants that settle on the concrete surface of the dam is that the superiority of the plants differs depending on the location as described above.

[0033]

As described in detail above, the present invention is useful for suppressing the growth and death of cyanobacteria and lichens, preserving various structures such as concrete structures, articles, archeological sites and the like. It has features such as being useful for aesthetics. In addition, the anti-algal and fungicides used have no harm to humans and animals and there is no danger of use. Further, in the present invention, if a structure using a transparent solvent is used, it can be used for various concrete structures and the like, and wide use can be expected.

[Brief description of the drawings]

FIG. 1 is a diagram showing the application positions of cyanobacteria and lichen removing agents on retaining walls.

FIG. 2 is a diagram showing a situation after application of a cyanobacteria / lichen remover composed of CT-1 to CT3 on a retaining wall portion.

FIG. 3 is a diagram showing a situation four months after application of a cyanobacteria / lichen remover composed of CT-1 to CT3 on a retaining wall.

FIG. 4 is a view showing the situation six months after application of the cyanobacteria / lichen remover composed of CT-1 to CT3 on the retaining wall.

FIG. 5 is a diagram showing a situation eight months after application of the cyanobacteria / lichen remover composed of CT-1 to CT3 on the retaining wall.

FIG. 6 is a view showing the condition of the retaining wall portion before application of CT-1 on the retaining wall portion, in which the growth of cyanobacteria such as ricinella and Iwaurokogoke can be confirmed.

FIG. 7 is a diagram showing the situation four months after the application of CT-1 to the retaining wall.

FIG. 8 is a view showing the condition of the retaining wall portion before application of CT-2 on the retaining wall portion, in which the growth of cyanobacteria such as ricinella and Iwaurokogoke can be confirmed.

FIG. 9 is a view showing the situation four months after the application of CT-2 to the retaining wall.

FIG. 10 is a view showing the condition of the retaining wall portion before application of CT-3 on the retaining wall portion, in which the growth of cyanobacteria such as ricinella and Iwaurokogoke can be confirmed.

FIG. 11 is a diagram showing the situation four months after the application of CT-3 to the retaining wall.

FIG. 12 is a diagram showing an outline of a railroad section of a dam to which CT-1 to CT-3 is applied.

FIG. 13 is an enlarged sectional view of a railing section.

FIG. 14 is a diagram showing a situation where CT-1 is applied to a high-rail section;

FIG. 15 is a diagram showing a situation three months after application of CT-1 to a railing.

FIG. 16 is a diagram showing a situation 16 months after application of CT-1 to a railing.

FIG. 17 is a diagram showing a situation where CT-2 is applied to a railing section.

FIG. 18 is a diagram showing a situation three months after application of CT-2 to a railing.

FIG. 19 is a diagram showing a situation 16 months after application of CT-2 to a railing.

FIG. 20 is a diagram showing a situation where CT-3 is applied to a railing section.

FIG. 21 is a diagram showing a situation three months after application of CT-3 on a railing.

FIG. 22 is a diagram showing a situation 16 months after application of CT-3 on a railing.

FIG. 23 is a diagram showing a non-processed high section in FIG. 20;

FIG. 24 is a diagram showing a non-processed high section of FIG. 21;

FIG. 25 is a diagram showing a non-processed high section of FIG. 22;

[Explanation of symbols]

 1 blue-green algae and remover remover 2 application 3 blue-green algae 4 lichen

Claims (5)

(57) [Claims] 1. A cyanobacteria / lichen removing agent comprising usnic acid and a usnic acid solvent as active ingredients. 2. A cyanobacteria / lichen removing agent comprising usnic acid, a usnic acid solvent and an antialgal agent as active ingredients. 3. A blue-green algae / lichen removing agent comprising usnic acid, a usnic acid solvent, an algaecide and a fungicide as active ingredients. 4. The usnic acid solvent is a solvent such as an alkylene oxide adduct of a lower alcohol, ethyl acetate, furfural, and furfural alcohol.
The cyanobacteria / lichen removing agent according to claim 2 or 3. 5. A cyanobacteria / lichen remover comprising usnic acid, a usnic acid solvent, an algaecide and a fungicide as active ingredients, and the cyanobacteria / lichen remover is provided on a concrete surface. A blue-green algae / lichen of a concrete object, wherein the blue-green algae / lichen is killed by using the cyanobacteria / lichen growth inhibitory power of the usnic acid. Removal method.