JPH0214302B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a tile joint material, and particularly to a tile joint material that suppresses mold growth in the joints by adding a chemical having a special antifungal effect.

[Prior Art] Mold that grows in tile joints not only impairs the aesthetic appearance, but also causes disease in some cases, and has become a major problem. To date, various studies have been conducted to address this problem, and joint materials containing antifungal agents have been devised.

The antifungal materials used include organic phosphorus compounds, organic tin compounds, tetrachloroisophthalonitrile compounds, and benzimidazole 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 depending on the concentration, they may be unsafe for the human body. There have been doubts about its long-term anti-mold effect, as there are concerns about this.

That is, toxicity is an issue for organic phosphorus compounds and organotin compounds, selection effect on bacterial species is an issue for tetrachloroisophthalonitrile compounds, and resistance to alkali is an issue for benzimidazole compounds. Although it was effective to some extent, it lacked long-term antifungal properties. In addition, in order to exhibit effective mold resistance,
It has the disadvantage that it needs to be added in a fairly large amount.

[Means for Solving the Problems] The gist of the present invention is a tile joint material characterized by containing an antibacterial zeolite compound in which the cations of the zeolite compound are replaced with a metal having antibacterial properties. .

That is, in order to solve the above-mentioned problems, the present inventors have discovered that zeolite compounds in which the cations are replaced with one or more metals such as silver, copper, and zinc have excellent antibacterial properties. Focusing on this, we conducted repeated studies on mold-proof joint fillers containing certain amounts of these ingredients, and finally completed the present invention.

In the present invention, silver, copper, and zinc are preferable as metals having antibacterial properties, and one or more of these are substituted with cations of zeolite,
Antibacterial zeolite compound. In addition to the above metals, nickel, cobalt, etc. can also be used.

These antibacterial zeolite compounds are groundbreaking not only because they have excellent antibacterial properties, but also because they are completely harmless to the human body, show no selectivity in their effects on bacterial species, and have long-lasting effects. It is something.

By the way, as is well known, zeolite
is the name of a hydrated aluminosilicate mineral of alkali or alkaline earth metal originally represented by the following chemical formula.

(M〓 ₂ , M〓)O・Al ₂ O ₃・mSiO ₂・nH ₂ O However, M〓 and M〓 indicate the following metals, etc.

M〓: Na ⁺ , K ⁺ , Li ⁺ , Rb ⁺ , NH ₄ ⁺ , C ₇ H ₁₅ N ₂ ⁺ ,
_{C8H16N +} , _Me4N ⁺ (TMA), ^{Et4N +} ( _TEA ),
Pr ₄ N ⁺ (TPA) M〓: Co ²⁺ , Mg ²⁺ , Ba ²⁺ , Sr ²⁺ , C ₈ H ₁₈ N ₂ ²⁺ The antibacterial zeolite compound used in the present invention is the above-mentioned M〓, The metal cation of M〓 is silver,
Substituted with copper, zinc, etc.

The substitution rate of this metal cation with antibacterial metals such as silver, copper, zinc, etc. is, for example, 20-100%, especially
It is preferable to set it to about 80% or more. Note that zeolites include natural products and synthetic products. Natural products have the advantage of being inexpensive, and synthetic products have the advantage of being stably available with constant properties. In the present invention, both natural and synthetic zeolites can be used. As synthetic zeolites, A, X and Y type zeolites are well known, but any of these may be used.

The preferred amount of antibacterial zeolite compound is:
It is preferably added in an amount of 0.01 to 10%, preferably 0.1% or more, based on the total amount of joint material.

In the present invention, as the base material for the joint material, conventionally used materials such as cement mortar-based materials, organic resin-based materials, etc. can be used.

[Effect] Although many aspects of the antibacterial properties of antibacterial zeolite compounds are still unknown, recent research has shown that the antibacterial properties of zeolite compounds depend on the type of cations attached to them.
This is thought to be due to the generation of nascent oxygen, which strongly oxidizes nearby organic matter. Fungi such as mold and viruses are organic substances;
Since it undergoes oxidative decomposition relatively easily, the antifungal effect can be maintained by adding an appropriate amount of oxidizing agent. In addition, the oxidizing properties of zeolite compounds act like catalysts, and this persistence is significantly longer than the antibacterial properties of other compounds, and there is no selectivity depending on bacterial species; It is also effective against.

[Example] Examples will be described below.

Example 1, Comparative Example 1 0.1% antibacterial zeolite compound in which 90% of the cations were replaced with copper in a joint material (base material) in which 0.2 parts by weight of methyl cellulose, a water retention agent, was added to 100 parts by weight of white cement. (Example 1), one with 0.1% tetrachloroisophthalonitrile fungicide added (Comparative Example 1), and one without additive (Comparative Example 2). After dealkalization,
After embedding and spraying OT aerosol onto an agar medium, the following bacterial species: Cladosporium cladosporioides, Aspergillus nieger, and Arterotheria were inoculated. When cultured for two months at a temperature of 30° C. and a relative humidity of 95%, no mold growth was observed only in Example 1 in which the zeolite compound was added.

Example 2, Comparative Example 3 The joint material containing 0.1% of the zeolite compound of Example 1 was applied to the bathroom wall of an actual building and kept for two years with minimal ventilation, but no mold growth was observed. Nakatsuta. On the other hand, mold growth was observed in commercially available joint material at the same location after about a year.

[Effect] As described above, the tile joint agent of the present invention contains antibacterial zeolite, exhibits excellent antibacterial action over a long period of time, and is highly effective in preventing the growth of mold and the like.

Claims (1)

[Scope of Claims] 1. A tile joint material characterized by containing an antibacterial zeolite compound in which the cation of the zeolite compound is replaced with a metal having antibacterial properties. 2. The base material of the tile joint material is a cement mortar-based material or an organic resin-based material, and the metal having antibacterial properties is one or more of silver, copper, and zinc. Tile grout material. 3. The tile joint material according to claim 1 or 2, wherein the content of the antibacterial zeolite compound is 0.01 to 10% by weight of the total amount of the joint material.