JPH02233603A - Alga and fungus preventing agent and coating composition containing same agent - Google Patents

Abstract

PURPOSE:To obtain the title agent exhibiting wide antifungal spectrum and being excellent in compatibility with coating without discoloring coating film by blending two kind of fungicides consisting of 2,3,5,6-tetrachloromethylsulfonyl pyridine and iodopropagylbutyl carbamate. CONSTITUTION:2,3,5,6-Tetrachloromethylsulfonylpyridine and iodopropagylbutyl carbamate which are fungicides are blended to provide the alga and fungus preventing agent remarkably widening in antifungal spectrum to Chlorophyceae, Cyanophyceae and fungus, being excellent in compatibility with coating without discoloring coating film. The alga and fungus preventing agent is added, preferably at an amount of 0.001-1wt.% to use the agent as a coating composition. Occurrence of algae and fungi in the wall surface of a building can be prevented for a long period and coating film is not discolored by applying the above- mentioned composition to exterior or interior of the building.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention has an excellent effect of preventing the growth of algae and mold in buildings such as painted outer and inner walls, PVC sheets, etc., and their materials.
Moreover, the present invention relates to an algae and fungicidal agent which is excellent in compatibility with paints and colorfastness of the paint film, and a paint composition K containing the same.

(Prior Art and its Problems) Various living things (algae, mold, moss, ferns, etc.) grow on buildings, such as outer walls, and most of them are algae and molds. Algae grow through photosynthesis, using moisture such as rainwater and adhering substances such as dust as nutrients. On the other hand, mold is an emulsion. It grows using organic matter such as paint and wall materials as nutrients.

The occurrence of these microorganisms causes various problems such as accelerated deterioration of paint films and wall surfaces, loss of aesthetic appearance, and KIF on the human body.

In order to prevent the growth of these microorganisms, antifungal agents have traditionally been added to paints, but since general antifungal agents do not have an algaecide effect, paints that have an antialgal and antifungal effect There was a desire for a drug that has excellent compatibility with the paint and does not cause discoloration of the coating film.

(Means for Solving the Problems) The present inventors have proposed that by mixing two of the existing antisepi-preventing agents, they will be used to treat filamentous unicellular green algae, blue-green algae, and fungi.
The inventors have now completed the present invention by discovering that the antibacterial spectrum of the antibacterial agent is significantly broadened9, and that it has excellent compatibility with paints and does not cause discoloration of the paint film.

That is, the present invention provides an anti-algal and anti-capillary agent containing 2,3,5,6-tetrachloromethylsulfoerpyridine and iododerro/gylbutyl carnomate as active ingredients, and a coating composition comprising the same. It is something.

(Structure) The mixing ratio of the two components is 2,3,5.6-tetrachloromethylsulfonylpyridine to iododeropagyl butyl carpamate (weight ratio) of 1:0.1 to 10, preferably 1: in the range of 0.2 to 0.5.

In order to prepare the above two components into a formulation, dimethylformamide,
It can be prepared by dissolving it in a solvent such as cyclohexanone, toluene, or xylene, or by dispersing it in a resin or water. However, for addition to oil-based paints and water-based paints, dimethylformamide K is preferably used as a formulation. The concentration of the active ingredient at that time is 10-50% by weight, preferably 20-40% by weight.

A surfactant may be added, for example a nonionic or anionic one, preferably in an amount of 1 to 5 weight percent, to obtain good dispersion in the formulation.

The paint of the present invention includes natural resins, synthetic resins such as phenolic resins, cellulose resins, vinyl resins, urea resins, alkyd resins, melamine resins, vinyl chloride resins, acrylic resins, ethylene-vinyl acetate resins, polyurethane resins, and polyurethane resins. Emulsions of resins, fluororesins, unsaturated polyester resins, etc. paints, water-based and oil-based paints.

The amount of the drug added to the paint is preferably 0. The active ingredient amount is about 0.001 to 1 weight.

(Effects) The present invention can prevent the growth of algae and mold on walls etc. for a long period of time by applying it to the exterior and interior materials of buildings with a brush, sdeley, etc. It does not discolor. Examples are shown below.
lJ is based on weight unless otherwise specified.

Iododero/#Gylbutylcarpamate 5 (hereinafter referred to as compound B) Benerol N-100 (Matsumoto Yushi Pharmaceutical ■) Dimethylformamide Compound A 20 Compound B 10 Ethylene glycol lO Penelol SP-24 (Matsumoto Yushi Pharmaceutical ■) 5 water
54
．． 9xanthanfum 0.1
Test example 1, (antibacterial activity test) Prepare a chemical solution diluted with sterile water, and dilute the diluted solution 1-50
℃K chilled medium (potato decoction medium and inorganic salt medium) 4
9- and placed in a sterilized petri dish with a diameter of 90 volts to prepare an agar plate containing a drug at a predetermined concentration. For mold K, a spore suspension of nine test bacteria was prepared by culturing in advance on a slant medium at 28°C for 7 days, and this was impregnated into a sterilized paper disk with a diameter of 8 mm, placed on a flat plate, and incubated at 28°C for 7 days. Cultivate for several days and check for mold growth. For algae K, 2 ml of a suspension of the test strain, which had been previously cultured on a slant medium in a sunlight incubator at 25°C for 14 days, was inoculated onto a plate medium, and then incubated at 25°C for 14 days.
Cultivate for several days and check for algae growth to ensure complete growth.
The minimum concentration of the drug to inhibit growth (minimum growth inhibition concentration) 1k was determined.

The drugs used in the test. , Example 1, and Comparative Example 1.2 were used.

Control Examples 1 and 2 and the results are shown below.

Control Example 1 (Formulation Example) Compound A Dimethylformamide {Nerol N-100 Control Example 2 (Formulation Example) Compound B Dimethylformamide Penerol N-100 Control Example 3 (Formulation Example) Total amount of Compounds A and B of Example 1 A preparation was prepared in the same manner except that 251K thiocyanomethylthiopenzothiazole was replaced.

/ / / 7/ G-1 to 5, B-1 to 4, and F-1 to 9 indicate the following algae and molds.

G-1 = Selenastrum ● Capricornutum G-2 = Chlorella ● Pulgaris G-3: Chlorella ● Species G-4: Scenedesmus Oprikis Islands G-5: Chlorococcum ● Echinojigatam B-1: Anapenakai Subi Seeds B -2: Anakistis-nideerans B-3 = Gloeocadesa alvicola B-4 Ninostoc Life Comien F-1: Asuillium niger F-2: -2 Nicilium citrinum F-3: I
J/-f., Stronifer F-4: Cladosporium clados 4 lioides F-5: Aureopathicum derlans F-6: Gliocladium virens F-7: Chaetomium gulo? Sum F-18: Fuderium moriniform F-9 = Alternaria quicutiana Test Example 2 Examples 1 to 2 and Control Example 3 2 parts by weight of the prepared drug were added to each paint K to check the compatibility between the paint and the drug. I tested it with K. In addition, the paint from these was applied to a slate board (7aw
X 1 551) and air-dried at room temperature for 7 days.
The paint film was irradiated with ultraviolet light (Ultraviolet 117 Aedometer K) for 48 hours and the discoloration of the paint film was investigated. The results are shown in Table 2K.

Test Example 3 Acrylic emulsion to which 0.2, 0.5, and 1.0 parts by weight of the drugs prepared in Example 1, Example 2, Control Example 1, and Control Example 2 were added. Paint on P paper test piece (43 x 4 m)
After applying K uniformly and air-drying it at room temperature for 7 days, it was placed on a flat solidified medium (potato decoction medium and inorganic salt agar medium) in advance on a petri dish, and the above-mentioned suspension of algae or mold was inoculated. The Petri dish was covered and incubated at 25°C for 28 days.
The growth status of algae and mold on the K test piece was investigated daily.

The results are shown in Table 3.

/ / The judgment criteria in Table 3 κ are as follows.

12 Sample surface K No growth of microorganisms observed at all.

±: Very small amount of microorganisms observed on part of the sample surface.

+: Growth of symptomatic organisms is clearly observed on approximately 1/3 or less of the sample surface.

+: Microbial growth is clearly observed on approximately 1/3 or more of the sample surface.

+V#: Vigorous growth of microorganisms is observed on the entire surface of the sample.

Test Example 4 An acrylic emulsion was applied to the north exterior wall of the warehouse where algae were actively breeding. It was applied by adding 0.2, 0.5, and 1.0% by weight to the standard paint. A K inorganic salt liquid medium was sprayed on the coated surface every 30 days to promote the growth of algae, and the state of reproduction was investigated. The results are shown in Table 4.

Claims (2)

[Claims] (1) An antialgal and antifungal agent containing 2,3,5,6-tetrachloromethylsulfonylpyridine and iodoprobagyl butyl carbamate as active ingredients. (2) A coating composition comprising the algae and fungicidal agent according to claim 1.