Claims
- 1. A method for preparing an antiviral composition comprising steps of
- preparing a solution of a thiosulfate salt and at least one thiosulfate complex salt of a metal, which is at least one selected from the group consisting of silver, copper and zinc,
- impregnating a porous particulate carrier with said solution by mixing said carrier with said solution, and,
- causing said salts to be carried on said carrier by drying said impregnated carrier.
- 2. The method for preparing an antiviral composition in accordance with claim 1, wherein said step of preparing the solution, comprising steps of
- adding at least one selected from the group consisting of a sulfite salt and a hydrogen sulfate salt to an aqueous solution of a water soluble salt of said metal, and then
- adding a thiosulfate salt to said aqueous solution.
- 3. The method for preparing an antiviral composition in accordance with claim 2, wherein 2-4 moles of at least one selected from the group consisting of a sulfite salt and a hydrogen sulfate salt, and 2-6 moles of thiosulfate salt are used for one mole of said water soluble salt of said metal.
- 4. The method for preparing an antiviral composition in accordance with claim 3, wherein said metal is silver, and said sulfite salt, hydrogen sulfate salt and thiosulfate salt are sodium salts.
- 5. The method for preparing an antiviral composition in accordance with claim 3, wherein said metal is silver, and said sulfite salt, hydrogen sulfate salt and thiosulfate salt are potassium salts.
- 6. The method for preparing an antiviral composition in accordance with claim 1, further comprising a step of coating at least part of the surface of the carrier carrying said salts with a coating material layer.
- 7. The method for preparing an antiviral composition in accordance with claim 6, wherein said carrier is silica gel, said step of coating the carrier carrying said salts comprising steps of
- mixing said carrier carrying said salts with an alcoholic solution of an alcoxysilane, and
- adding water to said mixture, thereby forming a coating layer of silicon dioxide over the surface of the carrier by hydrolyzing said alcoxysilane.
- 8. The method for preparing an antiviral composition in accordance with claim 2, further comprising a step of coating at least part of the surface of the carrier carrying said salts with a coating material layer.
- 9. The method for preparing an antiviral composition in accordance with claim 3, further comprising a step of coating at least part of the surface of the carrier carrying said salts with a coating material layer.
- 10. The method for preparing an antiviral composition in accordance with claim 4, further comprising a step of coating at least part of the surface of the carrier carrying said salts with a coating material layer.
- 11. The method for preparing an antiviral composition in accordance with claim 5, further comprising a step of coating at least part of the surface of the carrier carrying said salts with a coating material layer.
Priority Claims (3)
Number |
Date |
Country |
Kind |
4-275706 |
Oct 1992 |
JPX |
|
4-348113 |
Dec 1992 |
JPX |
|
5-006410 |
Jan 1993 |
JPX |
|
CROSS-REFERENCE TO RELATED APPLICATION
This is a division of U.S. patent application Ser. No. 08/134,124, filed Oct. 8, 1993, now U.S. Pat. No. 5,429,819.
US Referenced Citations (8)
Foreign Referenced Citations (6)
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Jun 1992 |
EPX |
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JPX |
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Aug 1992 |
JPX |
91204169 |
Feb 1993 |
JPX |
92064576 |
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JPX |
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GBX |
Non-Patent Literature Citations (2)
Entry |
Chemical Abstracts Service CA:97(21):174528w of Y. F. Borisovich et al., "Antiviral and Toxic Properties of Silver Thiosulfate Complexes," Tr.-Vses. Gos. Nauchno-Kontrol'n. Inst. Vet. Prep. (1980) 29-30:127-32. |
European Search Report dated Feb. 4, 1994 regarding European Patent Application No. EP 93 11 6576.5, 4 pages. |
Divisions (1)
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Number |
Date |
Country |
Parent |
134124 |
Oct 1993 |
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