Photographic elements containing scavengers for oxidized developing agent
AssigneeEastman Kodak Company
InventorsJohn W. Harder, John V. Nelson, Stephen P. Singer
Life of this patent
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Abstract
An improved photographic element comprises a support bearing at least one silver halide emulsion layer having associated therewith a hydrazide compound that functions as a scavenger for oxidized developing agent. The hydrazide compound includes an electron-withdrawing and aqueous-solubilizing group on an aromatic ring linked to the carbonyl of the hydrazide group and a ballasting group on an aromatic ring linked to a nitrogen atom of the hydrazide group. Preferably, the hydrazide compound is incorporated in a photographic element which comprises a four-equivalent 5-pyrazolone magenta-dye-forming coupler.
Claims24
A photographic element comprising a support bearing at least one silver halide emulsion layer having associated therewith a hydrazide compound that functions as a scavenger for oxidized developing agent;
- said hydrazide compound having the formula:
- ##STR22## wherein each X is, independently, a hydrogen atom or a process-cleavable group;
- R.sub.1 is an electron-withdrawing and aqueous-solubilizing group;
- each R.sub.2 is, independently, a hydrogen atom or a monovalent organic substituent;
- R.sub.3 is a ballasting group;
- each R.sub.4 is, independently, a hydrogen atom or a monovalent organic substituent;
- i is an integer with a value of 1 to 4;
- and
- j is an integer with a value of 1 to 4.
A photographic element comprising a support bearing at least one silver halide emulsion layer having associated therewith a hydrazide compound that functions as a scavenger for oxidized developing agent;
- said hydrazide compound having the formula:
- ##STR25## wherein:
- each X is, independently, a hydrogen atom or a process-cleavable group;
- R.sub.1 is an electron-withdrawing and aqueous-solubilizing group selected from the group consisting of
- --SO.sub.2 NH.sub.2
- --SO.sub.2 NHC.sub.6 H.sub.5
- --CONHC.sub.6 H.sub.5
- --SO.sub.2 NHCOC.sub.6 H.sub.5
- --CONH.sub.2
- --SO.sub.2 NHCH.sub.3 and
- --CONHCH.sub.3 ;
- each R.sub.2 is, independently, a hydrogen atom or a monovalent organic substituent which is not an electron-donating group;
- R.sub.3 is a ballasting group;
- each R.sub.4 is, independently, a hydrogen atom or a monovalent organic substituent which is not an electron-withdrawing group;
- i is an integer with a value of 1 to 4;
- and
- j is an integer with a value of 1 to 4.
A photographic element comprising a support bearing at least one silver halide emulsion layer having associated therewith a hydrazide compound that functions as a scavenger for oxidized developing agent, wherein said hydrazide compound has the formula:
- ##STR26## wherein:
- R.sub.5 is a hydrogen atom, or an acyl, alkyl or aromatic substituent;
- each X is, independently, a hydrogen atom or a process-cleavable group;
- each R.sub.2 is, independently, a hydrogen atom or a monovalent organic substituent;
- R.sub.3 is a ballasting group;
- each R.sub.4 is, independently, a hydrogen atom or a monovalent organic substituent;
- i is an integer with a value of 1 to 4;
- and
- j is an integer with a value of 1 to 4.
A photographic element comprising a support bearing at least one silver halide emulsion layer having associated therewith a hydrazide compound that functions as a scavenger for oxidized developing agent, wherein said hydrazide compound has the formula:
- ##STR27## wherein:
- R.sub.6 is a hydrogen atom or an acyl substituent;
- each X is, independently, a hydrogen atom or a process-cleavable group;
- R.sub.3 is a ballasting group;
- each R.sub.4 is, independently, a hydrogen atom or a monovalent organic substituent;
- and
- j is an integer with a value of 1 to 4.
A photographic element comprising a support and at least one silver halide emulsion layer and including:
- (1) a four-equivalent 5-pyrazolone magenta-dye-forming coupler in reactive association with said silver halide emulsion layer;
- and
- (2) in reactive association with said coupler a hydrazide compound that functions as a scavenger for oxidized developing agent;
- said hydrazide compound having the formula:
- ##STR28## wherein each X is, independently, a hydrogen atom or a process-cleavable group;
- R.sub.1 is an electron-withdrawing and aqueous-solubilizing group;
- each R.sub.2 is, independently, a hydrogen atom or a monovalent organic substituent;
- R.sub.3 is a ballasting group;
- each R.sub.4 is, independently, a hydrogen atom or a monovalent organic substituent;
- i is an integer with a value of 1 to 4;
- and
- j is an integer with a value of 1 to 4.
A multicolor photographic element comprising a support having thereon:
- (1) a blue-recording yellow-dye-image-forming layer unit;
- (2) a green-recording magenta-dye-image-forming layer unit;
- and
- (3) a red-recording cyan-dye-image-forming layer unit, each of said dye-image-forming layer units containing at least one silver halide emulsion layer comprised of a vehicle and silver halide grains and said element additionally comprising a scavenger for oxidized-color-developing agent;
- said scavenger being a hydrazide compound having the formula:
- ##STR31## wherein each X is, independently, a hydrogen atom or a process-cleavable group;
- R.sub.1 is an electron-withdrawing and aqueous-solubilizing group;
- each R.sub.2 is, independently, a hydrogen atom or a monovalent organic substituent;
- R.sub.3 is a ballasting group;
- each R.sub.4 is, independently, a hydrogen atom or a monovalent organic substituent;
- i is an integer with a value of 1 to 4;
- and
- j is an integer with a value of 1 to 4.
A photographic element comprising a support and at least one silver halide emulsion layer and including:
- (1) a four-equivalent 5-pyrazolone magenta-dye-forming coupler in reactive association with said silver halide emulsion layer;
- and
- (2) in reactive association with said coupler a hydrazide compound that functions as a scavenger for oxidized developing agent;
- said hydrazide compound having the formula:
- ##STR32##
Dependencies are inferred from the claim text.