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Silver-based inorganic antibacterial agent and method for producing same, and antibacterial-treated product

A technology of an inorganic antibacterial agent and a manufacturing method, which is applied in the directions of bactericides, inorganic chemistry, antibacterial drugs, etc., can solve the problems of unsustainability and fast dissolution rate of silver ions, and achieve the effect of excellent water resistance and sustainability.

Active Publication Date: 2012-04-25
TOAGOSEI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, under specific environmental conditions, for example, in applications exposed to water for a long time, because the dissolution rate of silver ions is fast, it may not be possible to obtain long-term effect persistence as a product.

Method used

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  • Silver-based inorganic antibacterial agent and method for producing same, and antibacterial-treated product
  • Silver-based inorganic antibacterial agent and method for producing same, and antibacterial-treated product
  • Silver-based inorganic antibacterial agent and method for producing same, and antibacterial-treated product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0130] In 300 ml of deionized water, 0.1 mol of oxalic acid dihydrate, 0.2 mol of zirconium oxychloride octahydrate containing 0.17% hafnium, and 0.05 mol of ammonium chloride were dissolved, and then 0.3 mol of phosphoric acid was added with stirring. After adjusting pH to 2.6 using 20% ​​sodium hydroxide aqueous solution in this solution, it stirred at 98 degreeC for 14 hours. Then, the obtained precipitate was carefully washed and dried at 120° C., whereby a zirconium phosphate compound was synthesized.

[0131] The amount of each component of this zirconium phosphate was measured, and the composition formula was as a result

[0132] Na 0.6 (NH 4 ) 0.4 Zr 1.98 f 0.02 (PO 4 ) 3 0.09H 2 O.

[0133] 450 ml of an aqueous solution of deionized water in which 0.05 mol of silver nitrate was dissolved was added to 0.09 mol of the obtained zirconium phosphate, and silver was supported by stirring at 60° C. for 2 hours. The silver-loaded slurry was filtered and washed with ...

Embodiment 2

[0139] Using zirconium phosphate having the following composition formula obtained in Example 1, the steps after the silver loading treatment step were changed as follows.

[0140] Na 0.6 (NH 4 ) 0.4 Zr 1.98 f 0.02 (PO 4 ) 3 0.09H 2 o

[0141] 450 ml of an aqueous solution in which 0.05 mol of silver nitrate was dissolved in deionized water was added to 0.09 mol of zirconium phosphate, and stirred at 60° C. for 2 hours to support silver. The slurry after carrying the processed silver was filtered and washed until the conductivity of the filtrate was 380 μS, and the solid content was adjusted to a volume specific gravity of 1.00 by drying at 120° C.

[0142] The composition formula obtained by measuring the amount of each component of the dry solid content composed of the silver-loaded zirconium phosphate is as follows.

[0143] Ag 0.55 Na 0.05 h 0.55 Zr 1.98 f 0.02 (PO 4 ) 3 0.14H 2 o

[0144] Furthermore, pyrolysis was performed by treating this dried produc...

Embodiment 3

[0147] Using zirconium phosphate having the following composition formula obtained in Example 1, the steps after the silver loading treatment step were changed as follows.

[0148] Na 0.6 (NH 4 ) 0.4 Zr 1.98 f 0.02 (PO 4 ) 3 0.09H 2 o

[0149] 450 ml of an aqueous solution in which 0.05 mol of silver nitrate was dissolved in deionized water was added to 0.09 mol of zirconium phosphate, and silver was supported by stirring at 60° C. for 2 hours. The slurry after carrying the treated silver was filtered and washed with water until the conductivity of the filtrate was 240 μS, and the solid content was adjusted to a volume specific gravity of 1.25 after drying at 120° C.

[0150] The composition formula obtained by measuring the amount of each component of the dry solid content composed of the silver-loaded zirconium phosphate is as follows.

[0151] Ag 0.55 Na 0.35 h 0.25 Zr 1.98 f 0.02 (PO 4 ) 3 0.11H 2 o

[0152] Furthermore, pyrolysis was performed by treatin...

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Abstract

Disclosed are a silver-based inorganic antibacterial agent which has high heat resistance, high chemical resistance, good processability and long-lasting waterproofness. Specifically, provided is a silver-based inorganic antibacterial agent, which contains zirconium pyrophosphate (ZrP2O7), represented by formula [1]: AgaMbZrcHfd(PO4)3 .nH2O. In formula [1], M represents at least one kind of ion selected from among an alkali metal ion, ammonium ion, hydrogen ion and oxonium ion; a, b, c and d represent each a positive number satisfying the requirements 1.75<(c+d)<2.2 and a+b+4(c+d)=9; and n is a number less than or equal to 2.

Description

technical field [0001] The present invention relates to a silver-based antibacterial agent mainly composed of silver-loaded zirconium phosphate, a method for producing the same, and an antibacterial processed product containing the antibacterial agent by mixing or coating. Compared with conventional antibacterial agents, the antibacterial agent of the present invention is not only excellent in water resistance, but also excellent in heat resistance, chemical resistance, and processability, and has excellent slow-release properties of silver ions, so it is water-resistant and durable with an antibacterial effect. silver-based inorganic antibacterial agent. Background technique [0002] In recent years, zirconium phosphate-based inorganic ion exchangers have been utilized in various applications by utilizing their characteristics. In the zirconium phosphate-based inorganic ion exchanger, there are amorphous zirconium phosphate, zirconium phosphate having a two-dimensional lay...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N59/26A01N59/16A01P3/00C01B25/42C01B25/45
CPCA01N59/16C01B25/45C01B25/42A61P31/04A01N25/08A01N59/26A01N2300/00
Inventor 杉浦晃治
Owner TOAGOSEI CO LTD
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