Photographic element containing a certain sulfonated acylacetanilide coupler in combination with low- or non-chloride emulsions
US5498515A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 17, 1994 |
| Grant date | Mar 12, 1996 |
| Priority date | — |
| Expiry date | Mar 17, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C7/3022
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The invention provides a photographic element comprising a support bearing a blue-light sensitive silver halide emulsion layer containing an acylacetanilide yellow image dye-forming coupler having formula I or II: ##STR1## wherein: R.sub.a is a substituted or unsubstituted alkyl, alkoxy, or aryloxy group; R.sub.b is a substituted or unsubstituted alkyl or aryl group; R.sub.c is hydrogen or a substituted or unsubstituted alkyl group; R.sub.1 is a substituent; n is an integer from 0 to 2; R.sub.2 is selected from the group consisting of halogen, trifluoromethyl, and substituted or unsubstituted alkoxy and aryloxy; R.sub.3 is a substituted or unsubstituted alkyl group; R.sub.4 is hydrogen, halogen, alkoxy carbonyl (--CO.sub.2 R), carbamoyl (--CONRR'), carbonamido (--NRCOR'), sulfonamido (--NRSO.sub.2 R') or trifluoromethyl; R.sub.1 is a substituent; X is hydrogen or a coupling-off group; wherein said blue-light sensitive silver halide emulsion layer is a low-chloride silver halide emulsion. The invention enables improved image quality through increased interimage effects.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.