Soluble glassy antimicrobial agent and water-treatment agent

Abstract

Disclosed is a soluble glassy antimicrobial agent that, when used for water treatment, exhibits a sufficient antimicrobial effect with minimal degradation and discoloration. Also disclosed is a granular water-treatment agent that has excellent filling and processing performance. The disclosed soluble glassy antimicrobial agent contains, in terms of oxide mass, 0-5% SiO2, 5-10% K2O, 0.1-5% Ag2O, 60-75% B2O3, 10-20% Al2O3, and between 0 and 10% of at least one oxide selected from among MgO, BaO, and ZnO. Said soluble glassy antimicrobial agent exhibits high antimicrobial performance with minimal degradation and discoloration. The disclosed water-treatment agent consists of the disclosed soluble glassy antimicrobial agent shaped into grains that bulge on at least one side. The result has excellent filling performance and water permeability and is highly useful as a water-treatment agent.

Description

technical field [0001] The present invention relates to an antibacterial agent made of soluble glass capable of eluting silver ions into water, and the antibacterial agent has high antibacterial effect, less discoloration, and small attenuation. Furthermore, the present invention is composed of the above-mentioned soluble vitreous antimicrobial agent, and is a granular water treatment agent excellent in fillability and water permeability. Background technique [0002] Conventionally, inorganic antibacterial agents are known in which antibacterial metals such as silver, copper, and zinc are supported on apatite, zeolite, glass, zirconium phosphate, silica gel, and the like. Compared with organic antibacterial agents, they are highly safe, and their active ingredients are less likely to volatilize or decompose, so they have the characteristics of long duration of antibacterial effect and excellent heat resistance. Therefore, antibacterial resin compositions obtained by mixing...

AI Technical Summary

Problems solved by technology

[0005] However, these vitreous antimicrobial agents do not pay attention to the attenuation of the glass in use, the location where the antimicrobial agent is installed, or the problem of discoloration caused by silver to peripheral parts, or do not provide sufficient solutions.

Usually, when a soluble glass shows attenuation, the glass itself is brittle, and the whole is easily cracked due to stress, etc., and only a specific component dissolves quickly from the surface to the inside of the glass, and the surface becomes fragments or powder when it is dried again. If the shape is peeled off, etc., when dissolving glass with attenuation is used as a water treatment agent, glass flakes and powders generated by attenuation may change the dissolution rate, or cause clogging and fouling, which may cause problems.

[0006] Regarding the problem of discoloration, it has been proposed that as an active ingredient of an antibacterial agent, a vitreous antibacterial agent containing zinc instead of silver that is easily discolored (for example, refer to Patent Document 9 and Patent Document 10), but this proposal has an antibacterial effect with silver The problem that the strength of the antibacterial effect of zinc is small compared to time

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