Aqueous composition containing oligodynamic metal
US10093885B2 · kind B2 · utility
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Key dates
| Filing date | Jan 26, 2015 |
| Grant date | Oct 9, 2018 |
| Priority date | — |
| Expiry date | Jan 26, 2035 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D9/30
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Disclosed is an aqueous composition having viscosity from 1 to 100 cP at 20° C., said composition comprising: (i) an oligodynamic metal or ions thereof; (ii) a chelating agent; and, (iii) free alkali less than 1 wt %, wherein said composition comprises 0.01 wt % to 2 wt % of a salt of an organic acid; pH of the composition is from 9 to 12 and molar ratio of said oligodynamic metal to said chelating agent is 1:0.25 to 1:10. The composition provides a robust solution for technical problems of discoloration and instability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.