Photographic products and processes employing metal complexable nondiffusible azo dye-releasing compounds
US4183755A · kind A · utility
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 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 azo dye moiety. The compound has the formula: ##STR1## wherein: G is a metal chelating group (or a salt or hydrolyzable precursor thereof) or a group which together with a ##STR2## is CAR (bonded through the oxygen); G.sup.1 is a hydroxy group (or a salt or hydrolyzable precursor thereof); PA1 Z is an electron withdrawing group; PA1 Z' is alkyl, aryl or N(R).sub.2 (R being H, alkyl or aryl); PA1 CAR is a ballasted carrier moiety; and PA1 t is 0 or 1. The dye can be transferred imagewise to an image-receiving layer where it can be contacted with metal ions to form a metal-complexed azo dye transfer image of excellent stability. The retained dye image in the photographic element can also be bleached, fixed and metallized to form a color transparency or a motion picture film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.