JPS62232481A - Joint mixture for tile - Google Patents

Abstract

PURPOSE:To keep a mildewproofing effect against all mildews over a long period of time and to prevent a joint mixture from being discolored by ultraviolet light, by adding a tetrafluoroisophthalonitrile mildewproofing agent to a joint mixture for tile. CONSTITUTION:A joint mixture for tile contains a tetrafluoroisophthalonitrile (hereinafter referred to as TFIPN) mildewproofing agent. Examples of the TFIPN mildewproofing agent are TFIPN itself and its derivatives such as polyester type polymers of TFIPN. Pref. the TFIPN mildewproofing agent is used in an amount of not less than 0.003wt% based on the total amount of the joint mixture. Examples of the base material for the joint mixture are cement mortar materials and org. resins.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a tile joint material, and particularly to a tile joint material with excellent antifungal effects.

[Prior Art] Various interior wall materials have traditionally been used for interior walls in bathrooms, kitchens, and other rooms, but among them, ceramic tiles are known for their versatility in design, durability, and stain resistance. It is widely used as an interior wall material because it has many excellent features such as durability.

When installing ceramic tiles, it is common to create joints between tiles, and cement-based or organic-based joint materials are used to fill these joints. .

By the way, as mentioned above, ceramic tiles used for interior wall materials have excellent stain resistance and have no problem with mold growth.
Various types of mold can be seen growing on the grout between the tiles.

Mold that forms at the joints of tiles not only spoils the aesthetic appearance of the wall surface, but also poses a serious problem, in some cases causing disease.

For this reason, various antifungal agents are mixed and used in joint materials. Conventionally, antifungal agents used in joint materials include organic phosphorus compounds, organic tin compounds, tetrachloroisophthalonitrile compounds, and penzimidazole compounds.

[Problems to be solved by the invention] However, the effects of commonly used antifungal agents vary depending on the type of mold, the antibacterial properties do not last long, and there are concerns about safety for the human body depending on the concentration. I had some problems.

In other words, toxicity is an issue for organic phosphorus compounds and organotin compounds, effectiveness in selecting bacterial species is an issue for tetrachloroinphthalonitrile compounds, and resistance to alkali is an issue for benzimidazole compounds. Although it had some effects, it lacked long-term fungibility.

In addition, in order to exhibit effective mold resistance, it is necessary to add a fairly large amount, it may not be effective depending on the type of base material used in one base material, and it may change color due to ultraviolet rays (sunlight). It also had drawbacks such as deteriorating the aesthetic appearance of the joints over time.

[Means for Solving the Problems] The gist of the present invention is a tile joint material characterized by containing a tetrafluoroisophthalonitrile fungicide.

That is, in order to solve the above problems, the present inventors developed tetrafluoroinphthalonitrile (hereinafter referred to as rTF I P
It is sometimes abbreviated as NJ. ) have excellent anti-mold properties, and after conducting repeated studies on anti-mold joint materials to which certain amounts of these are added, the present invention has been completed.

In the present invention, examples of the TFIPN-based fungicidal agent to be added to the joint material include TFIPN or its derivatives, and effective examples of the TFIPN derivatives include polyester type polymers of TFIFN.

Since such TFI PN-based fungicidal agents have extremely excellent antifungal effects, only a small amount is required to incorporate them into the joint material, usually 0.003% by weight based on the total amount of the joint material.
It is preferable to use the above amount.

In the present invention, [1j′I! ! As a base material for wood,
Conventionally used materials, such as cement mortar-based materials and right plate resin-based materials, can be used. Note that the LI joint material of the present invention may contain additives such as admixtures, pigments, and waterproofing agents, if necessary.

[Function] TFIPN-based fungicides have: (1) a significantly superior antifungal effect compared to conventional antifungal agents;

■ It is effective against all types of fungi, and has excellent effects against molds that are ineffective with conventional fungicides, such as sea bass and metroniff γ-bacteria.

■ It is effective when mixed with all types of joint materials, including not only cement mortar type but also organic resin type joint materials such as acrylic type.

Therefore, regardless of the base material of the joint material, by adding a small amount,
It is possible to obtain a 11J'II material that has no selectivity depending on bacterial species and has a high antifungal effect against any type of bacteria.

Moreover, TF I PN-based fungicide is ■ It is colorless and transparent.

■ Excellent UV resistance and will not discolor even when exposed to UV rays for long periods of time.

Therefore, the color tone of the joint material will not change depending on the formulation, and the color will not change over time and spoil the aesthetic appearance of the joint.

[Example code] Examples will be described below.

Example 1 TFIPN was added to a joint material in which 0.2 parts by weight of methylcellulose, a water retention agent, was added to 100 parts by weight of white cement.
One with 0.01% by weight of tetrachloroisophthalonitrile (No. 1), one with 0.1% by weight of tetrachloroisophthalonitrile (No. 2), and one with no addition (No. 3) were dealkalized. After that, it was embedded in an agar medium and sprayed with OT aerosol, and then inoculated with the following bacterial species: ■ Cladosporium - Cladosporioides, ■ Aspergillus niger, ■ Alterotheria, and ■ Rhizopus stolonifa. did. The mold was then cultured at a temperature of 30° C. and a relative humidity of 95%, and the growth of mold was examined. The results are shown in Table 1.

ptfJ1 table [Note] O...No mold growth Δ...Minor mold h11 occurrence ×...Mold occurrence XX...Expected mold occurrence Example 2 Implementation In the same manner as above in Example 1, except that the amount of TFIPN added was changed as shown in Table 2, The fungal effect was investigated. The results are shown in Table 2.

Table 2 Example 3 Joint fillers of the same formulation as the joint fillers No. 1 to 3 of Example 1 were applied to the bathroom walls of actual buildings, and the growth of mold was examined over time. The results are shown in Table 3.

Table 3 *l: Areas exposed to direct sunlight turn pale yellow.

Tree 2: Discoloration progresses further.

From the results of Examples 1 to 3, the tile joint material of the present invention has T
It is clear that by adding a small amount of FIPN, the joint area can be kept sanitary and beautiful for a long period of time without causing any mold growth against any bacterial species or discoloration even when exposed to ultraviolet rays.

[Effects of the Invention] As detailed above, the tile joint material of the present invention contains tetrafluoroisophthalonitrile, and (1) exhibits excellent antifungal action over a long period of time.

■ Prevents the growth and propagation of mold against all types of bacteria.

■ Excellent UV resistance and does not change due to sunlight, etc. (Previously, discoloration was noticeable, especially in white joint materials and light-colored joint materials, but this can be prevented.

) ■ The base material for the joint material is optional.

■ Because TFIPN is colorless and transparent, the original color of the joint material can be maintained.

It has such excellent effects that it can keep the tile joint area sanitary and beautiful for a long period of time.

Claims (3)

[Claims] (1) A tile joint material characterized by containing a tetrafluoroisophthalonitrile fungicide. (2) The tile joint material according to claim 1, wherein the base material of the tile joint material is a cement mortar-based material or an organic resin-based material. (3) The tile joint material according to claim 1 or 2, wherein the content of the tetrafluoroisophthalonitrile fungicidal agent is 0.003% by weight or more of the total amount of the joint material. .