JPS63297301A - Aqueous antifungal agent - Google Patents

Abstract

PURPOSE:To obtain an aqueous antifungal agent, containing a specific resin and preservative, capable of being readily removed and recoated without requiring much labor or cost and carrying out antifungal treatment without using an antifungal agent causing work and hygienic problems and having antifungal effects not inferior to those of a conventional solvent type antifungal coating. CONSTITUTION:An aqueous antifungal agent containing one or two or more resins selected from acrylic resins, such as water-soluble or water-dispersible polyacrylic acid esters, olefinic resins, such as polyethylene, and vinyl acetate based resins, such as polyvinyl acetate, and a preservative, such as triazine based, thiazole based or imidazole based preservative. The amount of the blended resin based on the above-mentioned agent is normally 5-30wt.% and the amount of the blended preservative is normally 0.01-5wt.%. Conventional additives, such as antioxidant, colorant or rust preventive agent, in addition to the afore-mentioned blending ingredients may be suitably blended in the above-mentioned agent. After applying a solvent type antifungal agent which has hitherto been commonly used, the afore-mentioned agent is preferably coated or sprayed on the formed coating films.

Description

[Detailed description of the invention] Industrial applications The present invention relates to an aqueous antifungal agent.

Conventional technology The ceilings, floors, and walls of brewing factories, food processing factories, rooms with poor sunlight, bathrooms, and washrooms in general homes have been suitable environments for mold to grow and multiply. Solvent-based anti-mold paints are applied to the environment, but the anti-mold effect is only effective for six months to one year at most, so the use of anti-mold agents containing sodium hypochlorite as the main ingredient is necessary to prevent mold from growing and multiplying. In reality, measures such as removing the mold or reapplying anti-mildew paint are being taken.

However, sodium hypochlorite emits a unique chlorine odor that strongly irritates the mucous membranes and skin of the eyes and oral cavity, causing problems in terms of work hygiene, and the reapplication of solvent-based antifungal paints is costly. Not only does it require a lot of effort and expense, but it also takes a considerable amount of time to dry after application, so brewing factories and food processing factories in particular are forced to suspend or suspend operations for a commensurate period of time. There is a problem.

Problems to be Solved by the Invention The present invention has been made to provide a fungicide that solves these problems.

A means for solving the problem, that is, the present invention, is a method that uses one or more resins selected from the group consisting of water-soluble or water-dispersible acrylic resins, olefin resins, and vinyl acetate resins, and a preservative. This invention relates to an aqueous antifungal agent containing.

Examples of the water-soluble or water-dispersible acrylic resin used in the present invention include nistyl polyacrylate, polymethacrylate, etc.; examples of the olefin resin include polyethylene, polypropylene, polystyrene, etc.; Examples of the resin include polyvinyl acetate, and two or more of these may be used in combination as appropriate.

When these resins are applied as an aqueous liquid to a wall surface, etc., they dry in a relatively short time (usually about 5 to 30 minutes) and form a water-resistant coating with sufficient strength for practical use. This coating can be easily removed by using an alkaline aqueous solution, such as about 0.05-2% sodium hydroxide aqueous solution.

The amount of these water-soluble or water-dispersible resins is usually about 5 to 30% by weight, preferably about 10 to 15% by weight, but is not limited thereto.

If desired, water-soluble or water-dispersible resins other than the above,
For example, polyurethane, polyvinyl alcohol, polyvinylamine, casein, etc. may be appropriately blended within the range that can achieve the intended purpose of the present invention.

The preservative to be blended with the above water-soluble or water-dispersible resin may be any known preservative, such as triazine preservatives, thiazole preservatives, imidazole preservatives, and tributyltin preservatives. , aromatic preservatives, furan preservatives, pyrrole preservatives, pyridine preservatives,
Pyrimidine preservatives, pyrazole preservatives, quinoline preservatives, nitrile preservatives, phenolic preservatives,
Examples include ammonium-based preservatives, and preferred are triazine-based preservatives, thiazole-based preservatives, imidazole-based preservatives, and tributyltin-based preservatives.

Two or more of these preservatives may be used in combination as appropriate.

The amount of preservative added is also not particularly limited, but is usually about 0.
01-5% by weight, preferably about 0.1-1% by weight.

In addition to the above-mentioned ingredients, the aqueous fungicide according to the present invention may appropriately contain conventional additives such as antioxidants, colorants, rust preventives, etc.

The water-based anti-mold agent according to the present invention can be used on ceilings where mold easily grows and propagates;
It may be applied directly to floors and walls by coating or spraying, but from the perspective of efficient mold removal treatment, it is recommended to apply the solvent-based anti-mold paint that has been commonly used in the past. Preferably, it is applied or sprayed onto the paint film.

After applying the water-based fungicide according to the present invention to a wall surface, etc., it usually
Since it dries naturally in 30 minutes to form a water-resistant coating with sufficient strength for practical use, the time required for work and business interruptions at brewing plants, food preparation and processing plants, etc. due to this application work is greatly reduced. At the same time, the nuclear anti-mold coating film will not be removed by peeling or dissolution from the wall surface etc. due to normal physical contact or adhering water due to dew condensation or water splashing.

The anti-mildew effect of this anti-mildew coating is completely comparable to that of ordinary solvent-based anti-mildew paint, and for example, it lasts about 6 to 10 months on walls of brewing factories, food processing factories, etc. .

If the anti-mold effect disappears and a large amount of mold grows, remove the mold together with the anti-mold film using an alkaline aqueous solution, such as an aqueous sodium hydroxide solution, and apply a new water-based anti-mold agent. Just fix it. The concentration of the aqueous alkali solution depends on the type of resin, etc., but is usually about 0.05-2%, preferably about 0.1-1%. In this case, if a solvent-based coating film is present on the base, post-treatments such as washing with water and drying after mold removal can be carried out efficiently.

In addition to alkaline aqueous solutions, surface-active mold removal solutions can also be used! 1. For example, an aqueous solution containing dioctyl sodium sulfosuccinate, alkylbenzenesulfonic acid, polyoxyethylene alcohol, etc. may be used.

Hereinafter, the present invention will be explained by examples.

Example 1-6 Aqueous antifungal agent 1-6 (D antifungal effect according to JIS z2911-1981) prepared according to the formulation (parts by weight) in Table 1.
The test was conducted in accordance with the "Mold Resistance Test Method" in the following manner. 1 Apply 0.05 g of the sample onto a filter paper with a diameter of 30stm, let it dry naturally, and then spread it on a plate medium (glucose 4°Og,
Peptone 10g1 Agar 15g1 Chloramphenicol 4
00 μg, at the center of 11 μg of purified water. Black mold (Aspergillus n.
iger)) spore suspension 1#! After uniformly distributing the solution on the surface of the medium and the test piece, culture is performed at 28±2°C for one week.

The obtained results are shown in Table 1 along with the strength of the coating film.

Comparative Examples 1 to 3 The antifungal effects of aqueous antifungal agents prepared according to the formulations shown in Table 1 were investigated in accordance with Examples 1 to 6.

The results are shown in Table 1 along with the strength of the coating film.

Table-1 2) Zaixen-A (manufactured by Steel Chemical Industry Co., Ltd.) 3) Movinyl 908 (manufactured by Hoechst Gosei Co., Ltd.) 4) Sunpack-P (
5) Proxel GXL (manufactured by ICI) 6) Sanni Ratna Zoooo (manufactured by Nitto Kasei) 7) JIS
Evaluation Example 7 based on Z-2911-1981 A water-based fungicide prepared by the following formulation was applied to the wall surface of a sake brewing factory (a wall surface coated with a conventional solvent-based anti-mold paint as a base) (with a coating thickness of : Approximately 10 μm) : Component
Part by weight acrylic resin
10 Toryozin-based preservatives
1 water 8
The coating film No. 9 completely dried in about 10 minutes.

This coating film had a practically sufficient anti-mildew effect for about 6 months.

After 6 months, the mold that had grown on the surface of the coating film was easily removed along with the coating film by spraying an aqueous solution of sodium hydroxide (0, s%).

Effects of the Invention The water-based anti-mold agent according to the present invention not only has a comparable anti-mold effect to conventional solvent-based anti-mold paints, but also can be easily removed without much effort or expense. Since it can be repainted, mold removal can be carried out without using a fungicide that poses problems in terms of work hygiene.

Claims (1)

[Scope of Claims] 1. A water-based preservative containing one or more resins selected from the group consisting of water-soluble or water-dispersible acrylic resins, olefin resins, and vinyl acetate resins and a preservative. Mildew agent. 2. The aqueous fungicide according to item 1, wherein the preservative is a triazine preservative, a thiazole preservative, an imidazole preservative, or a tributyltin preservative.