JPS5849673B2 - How to prevent deterioration caused by mold - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention uses wall materials such as PC boards, concrete, concrete blocks, and ALC boards as base walls of buildings.
When carrying out an interior construction method in which gypsum boards are directly pasted on the base wall with a dumpling-shaped adhesive mixed with water, and then the adhesive is applied on top of that and wallpaper is pasted in Steps 1 to 1, the dumplings are The present invention relates to a method for preventing deterioration caused by mold that occurs after completion of wall interior work by adding an agent that inhibits the growth of mold to both a wallpaper adhesive and a wallpaper adhesive.

Recently, a significant amount of mold has been found growing on the inner walls of buildings after construction work has been completed, and many interiors are being redone.

Mold is especially common on interior walls that have been beautifully finished with wallpaper buttons or cloth.

This phenomenon is hardly observed in the mortar construction method, but is commonly referred to among construction professionals as the GL construction method, the GL tapapetane construction method.
Use wall materials such as boards, concrete, concrete blocks, ALC boards, etc., and apply adhesive (for example, product name G) to the base wall.
Add water and knead L-Bond, Snow Bond), apply it to the basement wall in the form of dumplings, directly paste gypsum board (gypsum board, plasterboard, etc.) on top of it, and then apply adhesive on top of it. This is especially common after the completion of interior construction, which involves applying paint and pasting wallpaper.

This construction method is very easy to use and the construction can be completed in a short period of time.A layer of air is formed between the plasterboard and the base wall. This construction method is widely used in the construction of condominiums and other buildings because it has the advantage of creating very good heat and sound insulation conditions.

However, since no measures are taken to prevent the growth of mold in buildings constructed using these construction methods, the growth of mold is significant.
In particular, when hot and humid conditions occur during the rainy season, the beautifully finished wall surfaces become moldy and discolored, often requiring interior decoration to be redone.

Since redoing such interior work causes great damage in both labor and economic terms, there is a strong need for measures to prevent mold.

The present inventors have studied the mechanism of mold growth in this field and have come to the following conclusion.

In other words, an adhesive (for example, the above-mentioned GL Bond Suntapa Snow Bond) is applied to the base wall in the form of a dumpling, and the plasterboard pasted on top of the adhesive evaporates from the large amount of water contained in the adhesive. In order to significantly prevent mortality and volatilization, mold grows on natural substances such as starch glue or funori contained in adhesives.

This is a phenomenon that occurs inside the wall and does not appear on the surface, so it has no direct effect on aesthetics and the appearance of mold is not a problem at this point.

Next, the moisture that was significantly prevented from evaporating by the plasterboard will eventually migrate to the plasterboard, but since this plasterboard is covered with wallpaper, cloth, vinyl, etc. for interior use, moisture can also be absorbed here. This prevents the evaporation and volatilization of moisture, resulting in moisture remaining between the plasterboard and the wallpaper.

Adhesives containing natural substances as mentioned above exist between the plasterboard and the wallpaper to fix the wallpaper, and this adhesive migrates and absorbs the remaining moisture, making it easier for mold to grow. It is a source of nutrients.

In this way, when the conditions for mold growth are satisfied, mold grows rapidly in a short period of time and appears on the surface of the wallpaper.

In this way, the interior walls deteriorate, resulting in a significant loss of aesthetics and eventually requiring the interior to be redone.

As a result of separating and fixing the molds generated here, the present inventors found that the typical degrading bacteria are Penicillium, Alternaria, and Burularia.

Based on such knowledge, the present inventors have conducted various studies on methods for suppressing the growth of mold by attaching buttons to interior walls and preventing their deterioration.

As a result, by adding an anti-mold agent to both the button-shaped adhesive button and wallpaper adhesive such as GL Bond and Snow Bond, it was found that the anti-mold agent was added only to the adhesive adhesive such as GL Bond. They discovered that deterioration due to mold can be prevented for a longer period of time than would otherwise be the case, and completed the present invention.

Compounds that are effective in preventing the growth of molds and preventing deterioration include 2-(4-thiazolyl)-penzimidazole, methyl 2-penzimidazole carbamate, methyl 1-butylcarbamoyl-2-penzimidazole carbamate, -chloro 3,5-xylenol 4-
Kuroro 31? Resole, zinc dimethyl dithiocarbamate, tetramethylthiuram disulfide, zinc ethylene bisdithiocarbamate, 2,3-dichloro 1,
4-naphthoquinone, 2,4,5.6-tetrachloroisophthalonitrile, N-(trichloromethylthio)-tetranohydrophthalimide, dimethyllaurylbenzylammonium chloride, triphenyltin chloride,
Examples include N'-(dinechlorofluoromethylthio)-N,N-dimethyl-N'-phenylsulfamide.

These compounds can be used as raw materials or in the form of emulsions or aqueous agents.

Next, some examples of the formulation will be illustrated.

Formulation Example 1 (Emulsion) 5 parts of 2-(4-thiazolyl)-benzimidazole (indicates parts by weight, the same applies hereinafter), 85 parts of dimethyl sulfoxide, and 10 parts of Solpol 2939 (trade name of emulsion manufactured by Toho Chemical Industry Co., Ltd.). They were mixed and dissolved to form an emulsion.

This product can be used directly or diluted with water.

Formulation Example 2 (Irrigation agent) 40 parts of 4-chloro-3,5-xylenol, 8 parts of lauryl sulfate, and 52 parts of clay were uniformly mixed and pulverized to prepare an irrigation agent.

This product is used after being diluted with water.

Reference example GL Bond (trade name of adhesive manufactured by Yoshino Gypsum Co., Ltd.) 25
parts [4-chloro-3,5-xylenol to 0.0 parts] 5%
14 parts of the medicinal solution (diluted solution of the irrigation agent of Formulation Example 2) were added and thoroughly kneaded.

Approximately 3001 of the kneaded GL Bond was applied to the concrete of the base wall in the form of dumplings at a ratio of 14 to 1.712, and a plaster board was immediately attached and left to adhere for 4 hours.

Four days later, wallpaper was attached to the gypsum board using a vinyl acetate/polyvinyl alcohol copolymer adhesive.

No mold growth was observed for 60 days thereafter.

On the other hand, when the interior work was carried out in the same manner as in this reference example without adding a fungicidal agent, blue mold developed over the entire structure and deteriorated after 14 days.

1, 4-chloro-3,5-xylenol o. 0.0% of 2-(4-thiazolyl)-benzidazole instead of the chemical solution containing s%. A similar phenomenon occurred when a 5%-containing drug solution (a diluted solution of the emulsion of Formulation Example 1) was used.

This reference example was carried out during the rainy season, when mold growth is most active.

Example Snowbond (trade name of adhesive manufactured by Nitto Gypsum Co., Ltd.)
2 5 parts [14 parts of a chemical solution containing 0.3 parts of 2-(4-thiazolyl)-benzimidazole (diluted emulsion of Formulation Example 1) was added and mixed well, and the mixture was applied to the concrete of the base wall, 14 pieces per 1 m2. It was applied in the form of dumplings at a ratio of 100 to 1000 ml, and a plasterboard was immediately attached and left for 4 hours to adhere.

Two days later, wallpaper was pasted onto the plasterboard using starch paste containing 0.3% 4-chloro-3,5-xylenol.

No mold growth was observed for more than 90 days thereafter.

On the other hand, when the interior work was carried out in the same manner as in this example without adding any antifungal agent, blue mold was observed to grow from the Snowbond bonding site from the 7th day after the wallpaper was pasted.
After a few days, mold grew all over the wallpaper and it deteriorated.

This example was carried out during the rainy season when mold growth is most active.

As is clear from the comparison between the reference examples and examples above, when an antifungal agent is added to the adhesive balls, mold growth can be prevented for a much longer period of time than when no chemical treatment is used. .

Furthermore, if an anti-mold agent is added to both the adhesive used for pasting the wallpaper and the adhesive used for pasting the wallpaper, it will last longer than when the anti-mold agent is added to the adhesive alone. It is clear that the growth of mold can be prevented over a period of time, and the method of preventing deterioration caused by mold according to the present invention is extremely effective.

Claims (1)

[Claims] 1. Use wall materials such as PC boards, concrete, concrete blocks, ALC boards, etc. on the base wall of the building, and directly attach gypsum boards to the base wall using a ball-shaped adhesive mixed with water. When carrying out the interior construction method of applying adhesive and pasting wallpaper on top of the walls, both the dumpling-shaped adhesive and the wallpaper adhesive are added with an agent that prevents the growth of mold. A method to prevent deterioration due to mold that occurs after interior construction is completed.