Photographic products and processes employing nondiffusible 1-arylazo-4-isoquinolinol dye-releasing compounds
US4183754A · kind A · utility
3Cited by
2References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 10, 1978 |
| Grant date | Jan 15, 1980 |
| Priority date | — |
| Expiry date | Oct 10, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S534/02
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Photographic elements, diffusion transfer assemblages and processes are described which employ a novel nondiffusible compound having a releasable 1-arylazo-4-isoquinolinol dye moiety. The compound contains: PA1 (a) in the ortho position of the arylazo moiety a metal chelating group, a salt thereof or a hydrolyzable precursor thereof; and PA1 (b) a ballasted carrier moiety which is capable of releasing the diffusible azo dye under alkaline conditions. The dye is transferred imagewise to an image-receiving layer where it is contacted with metal ions to form a metal-complexed azo dye transfer image of excellent stability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.