Pigment compositions
US5718754A · kind A · utility
26Cited by
2References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 24, 1997 |
| Grant date | Feb 17, 1998 |
| Priority date | — |
| Expiry date | Jan 24, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B67/0041
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The invention provides a pigment composition comprising a pigment having adsorbed on its surface, or as a physical mixture, up to 10% by weight, based on the total weight of pigment composition of a coding compound which is a compound containing an azo, azomethine or polycyclic chromophore and which has an absorption spectrum and a Raman spectrum different from that of the pigment. The compositions are suitable for use in printing inks for security applications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.