Photographic element with dye-forming coupler and stabilizing compound
US6444412B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 21, 2001 |
| Grant date | Sep 3, 2002 |
| Priority date | — |
| Expiry date | Aug 21, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C7/3885
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The invention relates to a photographic element comprising a light sensitive silver halide emulsion layer having associated therewith one or more dye-forming couplers and a stabilizer compound of formula (I): whereinR1 and R2 are independently selected from hydrogen or an unsubstituted or substituted alkyl, aryl, alkoxy, aryloxy or amino group or may combine to complete a 5-10 membered heterocyclic ring which may contain in addition to the silicon atom one or more heteroatoms selected from nitrogen, oxygen and sulfur, which ring is unsubstituted or substituted;each Z independently represents the atoms necessary to complete a substituted or unsubstituted arene or heteroaromatic ring system;X is a single bond or a linking group having a single atom which connects the arene rings or heteroaromatic ring systems; orX forms, together with substituents ortho to X on the arene rings or heteroaromatic ring systems, a fused unsubstituted or substituted 5-, 6- or 7-membered ring, which may contain one or two heteroatoms selected from nitrogen, oxygen and sulfur.The stabilizer is used to enhance the image stability of the dye formed from a cyan, magenta or yellow dye-forming coupler without si…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.