Photographic products and processes employing nondiffusible 1-arylazo-4-isoquinolinol dye-releasing compounds
US4148642A · kind A · utility
10Cited by
25References
35Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 7, 1978 |
| Grant date | Apr 10, 1979 |
| Priority date | — |
| Expiry date | Mar 7, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C8/10
- 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: (a) in the ortho position of the arylazo moiety a metal chelating group, a salt thereof or a hydrolyzable precursor thereof; and (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.