Water-soluble glass water-treating agent
AssigneeKinki Pipe Giken Kabushiki Kaisha
InventorToyohiko Kuno
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Abstract
A water-soluble glass treating agent consisting essentially of, by weight: 55 to 80% of SiO.sub.2, 19.5 to 42% of Na.sub.2 O and 0.5 to 3% of Ag.sub.2 O (conversion for AgNO.sub.3) is disclosed. Also disclosed is a water-soluble glass treating agent further containing, by weight: 0.5 to 30% of Al.sub.2 O.sub.3 in the above compositions. These glass water treating agents are glass free from boron constituent but which functions to kill or suppress bacteria and micro-organisms and are low in cost because it is simple in the composition of glass which is composed principally of three constituents at max. That agent which contains Al.sub.2 O.sub.3 functions to increase concentration of Ag in glass and to decrease the deliquescent property of glass.
Claims4
A boron-free water-soluble glass for treating water consisting essentially of, by weight:
- 57 to 72% of SiO.sub.2, 19.5 to 35% of Na.sub.2 O and 1.0 to 2.0% of Ag.sub.2 O.
A boron-free water-soluble glass for treating water consisting essentially of, by weight:
- 57 to 72% of SiO.sub.2, 19.5 to 35% of Na.sub.2 O, 1.0 to 2.0% of Ag.sub.2 O and 3 to 19.6% of Al.sub.2 O.sub.3.
Dependencies are inferred from the claim text.