JPH115709A - Resin bathtub having antimicrobial property - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent discoloration of a bathtub due to antimicrobial agent with the passage of time in the case where the antimicrobial agent is included in the resin bathtub in order to impart antimicrobial property to the bathtub. SOLUTION: This resin bathtub having antimicrobial property is obtained by including an apatite-based antimicrobial agent comprising a mixed sintered material of hydroxyapatite with an antimicrobial component and having a shape carrying the antimicrobial component on apatite sintered material into a resin bathtub in the state in which particles of the antimicrobial agent are exposed on the surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin bath having antibacterial properties, and more particularly, to a resin bath having excellent discoloration resistance.

[0002]

2. Description of the Related Art Bathtub dirt is mainly caused by dirt, soap scum and the like discharged from humans adhering to a bathtub, and microorganisms such as bacteria multiply as bait and are firmly fixed to the inner surface of the bathtub. . Therefore, it has been considered that an antibacterial agent is added to the resin bathtub to provide the antibacterial property, thereby suppressing the growth of microorganisms and making the bathtub hardly soiled or easily soiled.

Various kinds of antibacterial agents are conventionally known, but can be roughly classified into organic antibacterial agents and inorganic antibacterial agents. Thus, organic antibacterial agents have a problem that heat resistance is low and durability is inferior. Therefore, in general, they have excellent heat resistance and have a broad antibacterial spectrum and exhibit effective antibacterial properties against various bacteria. Inorganic antibacterial agents are mainly used.

In the case of this inorganic antibacterial agent, zeolite,
Inorganic oxides such as zirconium phosphate, silica gel, water-soluble glass, and titania are used as carriers, and silver, copper,
Antimicrobial components such as zinc are supported (in various forms, such as ion exchange, adsorption, solid solution, and support as glass components), and silver has the most antibacterial ability. Because of high safety and high safety, those carrying silver as an antibacterial component are most often used.

[0005]

However, when the above-mentioned conventional antibacterial agent, particularly a silver-based antibacterial agent carrying silver as an antibacterial component, is contained in a bathtub to impart antibacterial properties, Under long-term immersion in warm water such as a bathtub, the resin bathtub changes color over time (eg yellowing)
It has been found that this causes a problem that the beauty of the bathtub is impaired.

One of the reasons is that, for example, in the case of an antibacterial agent containing silver as an antibacterial component, silver ions elute during the use of a bath, and the eluted ions change into colloids or cause chemical reactions with other substances. It is considered that the above discoloration occurs.

[0007]

The invention of the present application has been made to solve such a problem. Thus, the resin bath having antibacterial properties of the present invention is made of a mixed sintered body of hydroxyapatite and an antibacterial component, and an apatite-based antibacterial agent in a form in which the antibacterial component is carried on a sintered apatite is used as the antibacterial agent. It is characterized in that the agent particles are contained in the bathtub in a state where they are exposed on the surface.

[0008]

As described above, according to the present invention, an apatite-based antibacterial agent obtained by mixing and sintering an antibacterial component simultaneously with sintering in an apatite sintered body is contained in a resin bath. When a resin bath containing such an apatite antibacterial agent was subjected to an immersion test in various chemical solutions containing warm water, hot water was compared with a bath containing an antibacterial agent having silver supported on a carrier such as zeolite or borosilicate glass. It has been confirmed that the composition has extremely high stability to chemicals and chemicals and exhibits good discoloration resistance.

The present invention has been made based on such findings. For example, in the case of an antibacterial agent having silver supported on zeolite, silver ions elute and exhibit antibacterial properties. And at the same time, it causes a problem of discoloration due to the eluted silver ions.

However, in the case of an apatite-based antibacterial agent, the antibacterial component is sintered at a high temperature of, for example, 1000 ° C. or more, and the antibacterial component is firmly fixed and held in a carrier. Antimicrobial components hardly elute in the form of ions. Therefore, in the case of a resin bath containing such an apatite-based antibacterial agent, it is considered that the antibacterial property does not disappear or decrease over a long period of time, and no discoloration due to elution of antibacterial component ions occurs.

However, in the present invention, since the antibacterial action is not due to the elution of the antibacterial component ions, it is necessary to contain the antibacterial agent particles in the bathtub in a state where they are exposed on the surface. In the present invention, silver is preferably used as an antibacterial component, but other antibacterial components such as copper and zinc may be used.

The content of the antibacterial agent in the resin bath is desirably 0.1 to 5.0% by weight based on the entire bathtub material. If the amount is less than 0.1% by weight, a sufficient antibacterial effect cannot be obtained. On the contrary, if the amount is more than 5.0% by weight, the effect on the degree of curing of the resin is exerted, and the effect on the strength physical properties comes out accordingly. Come. In addition, the cost is increased.

As the apatite antibacterial agent, it is desirable to use fine particles having a particle size of 0.1 to 4 μm and to uniformly disperse them on the surface of the resin bath. In this case, the antibacterial effect can be exhibited with a small amount, and therefore, when the antibacterial agent is kneaded and contained in the bathtub material, there is obtained an advantage that the general performance of the bathtub is not deteriorated.

[0014]

Next, embodiments of the present invention will be described in detail. Various silver-based antibacterial agents shown in Table 1 on gel coat resin based on unsaturated polyester resin, specifically, apatite-based antibacterial agents having silver supported on apatite, zeolite-based antibacterial agents having silver supported on zeolite, boron A borosilicate glass-based antibacterial agent having silver supported on silicate glass and a zirconium phosphate-based antibacterial agent having silver supported on zirconium phosphate were added and mixed to form a bathtub material, which was used to form a resin bathtub.

The mixing ratio between each molding material and the antibacterial agent is as follows:
The antibacterial agent for the molding material 100 was set to 1.0. Then, this was mixed with various chemicals shown in Table 1 (tap water, 60 ° C tap water,
Commercial bath agent A (pH 8.05), commercial bath agent B (pH
7.31)) was subjected to an immersion test to evaluate the degree of discoloration. The results are shown in Table 1.

The above-mentioned apatite antibacterial agent has a particle size of 0.1.
This was a fine one having a size of 1 to 4 μm, which was uniformly dispersed and exposed on the bathtub surface. However, the antibacterial agent particles can be dispersed and exposed on the surface of the bathtub by mixing and kneading the molding material containing the resin material and the antibacterial agent and forming the bathtub. The immersion test was performed for 30 days, and the discoloration was evaluated by observing the degree of discoloration after leaving for 30 days.

[0017]

[Table 1]

As can be seen from the results in Table 1, the resin bath containing an apatite antibacterial agent as an antibacterial agent has good discoloration resistance. Although an antibacterial test was also conducted, the resin bath containing the apatite antibacterial agent showed sufficient antibacterial properties.

Although the embodiment of the present invention has been described in detail above, this is merely an example, and the present invention can be implemented in variously modified forms without departing from the gist thereof.

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Koji Shibata 5-1-1 Koiehonmachi, Tokoname-shi, Aichi Pref.

Claims (1)

[Claims] An apatite-based antibacterial agent comprising a mixed sintered body of hydroxyapatite and an antibacterial component, wherein the antibacterial component is supported on a sintered apatite, in a state where particles of the antibacterial agent are exposed on the surface. A resin bath having antibacterial properties, characterized in that the bath is contained in the bath.