Radiation curable photochromic inks
US7556844B2 · kind B2 · utility
30Cited by
14References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 9, 2006 |
| Grant date | Jul 7, 2009 |
| Priority date | — |
| Expiry date | Aug 2, 2027 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2211/1092
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An ink that may be used in ink jet devices is a photochromic ink comprising an ink vehicle that includes at least one radiation curable component, at least one photochromic material and at least one photoinitiator. The ink is cured via exposure to radiation that cures the at least one radiation curable component of the ink. A radiation curable ink capable of exhibiting photochromatic color changes, which may be used to indicate a document's authenticity, is thus achieved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.