UV-VIS radiation curable security inks for producing dichroic security features
US12215242B2 · kind B2 · utility
0Cited by
1References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 9, 2021 |
| Grant date | Feb 4, 2025 |
| Priority date | — |
| Expiry date | Feb 9, 2042 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K2201/011
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention provides a UV-Vis radiation curable security ink for producing a security feature for securing value documents, wherein said security feature exhibits a blue color upon viewing in transmitted light and a metallic yellow color upon viewing in incident light. The UV-Vis radiation curable security ink comprises a cationically curable or a hybrid curable ink vehicle, and silver nanoplatelets bearing a surface stabilizing agent of general formula (I)
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.