Process for preparing an aqueous gel ink with fixed color comprising silver or gold nanoparticles
US12240984B2 · kind B2 · utility
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19Claims
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Key dates
| Filing date | Aug 28, 2020 |
| Grant date | Mar 4, 2025 |
| Priority date | — |
| Expiry date | Mar 20, 2042 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K2003/0831
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention relates a process for preparing an aqueous gel ink with fixed color comprising the following steps: (i) preparing a gel-based matrix of aqueous ink; (ii) preparing an aqueous suspension of gold or silver nanoparticles with a fixed color; (iii) adding the aqueous suspension of gold or silver nanoparticles obtained in step (ii) to the gel-based matrix of aqueous ink obtained in step (i).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.