Nondiffusible metal-complexed azo dye-releasing compounds
US4426326A · kind A · utility
1Cited by
4References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 28, 1982 |
| Grant date | Jan 17, 1984 |
| Priority date | — |
| Expiry date | Jun 28, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C8/10
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Nondiffusible compounds having a releasable azo dye moiety have the formula: ##STR1## wherein: (a) each Z and Z.sup.1 completes an aromatic carbocyclic or heterocyclic nucleus having at least one ring of 5 to 7 atoms; PA1 (b) G is a metal chelating group; PA1 (c) each CAR is a ballasted carrier moiety; PA1 (d) Me is a polyvalent, hexacoordinate metal ion; and PA1 (e) each n is 0 or 1, with the proviso that at least one n is 1. These compounds are useful as dye-releasers in photographic elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.