Photographic element containing yellow dye-forming coupler comprising a dye light stability enhancing ballast and process
US5677114A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 15, 1996 |
| Grant date | Oct 14, 1997 |
| Priority date | — |
| Expiry date | Jul 15, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C7/30535
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A photographic element comprises a light sensitive silver halide emulsion layer having associated therewith an open chain .alpha.-carbonyl acetanilide yellow dye-forming coupler having the formula: ##STR1## wherein R.sub.1 is selected from the group consisting of alkyl, aryl, heterocyclic, and amino groups, provided that R.sub.1 may form a ring bonded to another carbon atom which is a member of Ring "A"; PA1 each R.sub.2 is independently selected from the group consisting of those substituents having a Hammett's sigma value of 0 or less, and m is from 0 to 4; PA1 each R.sub.3 and R.sub.4 for each of the n carbon atoms is independently selected from the group consisting of hydrogen, alkoxy, aryl, heterocyclic, aryloxy, and alkyl groups, and n is 0 to 16; PA1 each R.sub.5 is independently selected from the group consisting of amino, alkyl groups, and groups linked to the "B" ring by oxygen or sulfur, and p is 1 to 3, provided that two R.sub.5 groups may join to form a ring; PA1 each L is independently a divalent linking group and q is 0 to 3; and PA1 Ring "A" is bonded indirectly to the 3-, 4-, or 5-position of Ring "B", PA1 R.sub.6 is selected from the group consisting of alkyl, ary…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.