Back to results
US 5,561,037 AGranted
Photographic elements containing magenta dye forming couplers and fade reducing compounds
AssigneeEastman Kodak Company
InventorsRakesh Jain, William R. Schleigh
Life of this patent
Estimating the term…
Abstract
Dye fade in photographic images prepared from a silver halide photographic element having a light sensitive silver halide emulsion layer and a pyrazoloazole dye forming coupler is reduced by using a combination of stabilizer compounds of formula S, formula I and optionally formula R. ##STR1##
Claims10
A silver halide photographic element comprising a support bearing a light sensitive silver halide emulsion layer and a cyclic azole magenta dye forming coupler associated with a stabilizer combination comprising:
- i) a compound having the following Formula S:
- ##STR15## ii) a compound having the following Formula I:
- ##STR16## wherein:
- R.sub.3 represents an aryl group or a heterocyclic group;
- Z.sub.1 and Z.sub.2 each represent an alkylene group having 1 to 3 carbon atoms provided that the total number of carbon atoms in the ring is 3 to 6;
- n is an integer of 1 or 2;
- Y is --NHSO.sub.2 -- or --SO.sub.2 NH--;
- each R.sub.10 is independently hydrogen or an alkyl, aryl, cycloalkyl, acyl or acylamino group;
- R.sub.11 is alkyl, aryl, or cycloalkyl group;
- w is an integer of 0 to 4;
- R.sub.12 is an alkyl, aryl, or cycloalkyl group;
- Q is an alkyl, aryl, alkoxy, aryloxy, amino, alkylamino or anilino group;
- and
- R.sub.13 is an alkyl group.
11 more elements
Dependencies are inferred from the claim text.