Blocked photographic reagents
AssigneeEastman Kodak Company
InventorsJames P. Vanmeter, Chin H. Chen
Life of this patent
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Abstract
.alpha.-Ketoimidomethyl blocked photographic reagents are useful in photographic elements, film units and processes. The blocked photographic reagents have the structure: ##STR1## wherein J represents ##STR2## X represents the atoms to complete a 5- or 6-membered ring or ring system; R represents alkyl of 1 to 30 carbon atoms or aryl of 6 to 30 carbon atoms; and PR represents the residue of an organic photographic reagent containing a heteroatom through which it is joined to the blocking group.
Claims21
A photographic image transfer film unit comprising:
- (a) a photosensitive element comprising a support bearing a layer of a silver halide emulsion having associated therewith a dye-image-providing material, and
- (b) a dye image-receiving layer, the film unit containing an .alpha.-ketoimidomethyl blocked photographic reagent having the structure:
- ##STR13## wherein:
- J represents ##STR14## X represents the atoms to complete a heterocyclic nucleus containing at least one 5- or 6-membered ring;
- R represents alkyl of 1 to 30 carbon atoms or aryl of 6 to 30 carbon atoms;
- and
- PR represents the residue of a development inhibitor containing a sulfur or nitrogen atom through which it is joined to the .alpha.-ketoimidomethyl blocking group.
A photographic image transfer film unit comprising
- (a) a photosensitive element comprising a support having thereon a red-sensitive silver halide emulsion unit having associated therewith a cyan-dye-image-providing material, a green-sensitive silver halide emulsion unit having associated therewith a magenta-dye-image-providing material and a blue-sensitive silver halide emulsion unit having associated therewith a yellow-dye-image-providing material;
- and
- (b) a dye-image-receiving layer;
- the film unit containing an .alpha.-ketoimidomethyl blocked photographic reagent having the structure:
- ##STR15## wherein:
- J represents ##STR16## X represents the atoms to complete a heterocyclic nucleus containing at least one 5- or 6-membered ring;
- R represents alkyl of 1 to 30 carbon atoms or aryl of 6 to 30 carbon atoms;
- and
- PR represents the residue of a development inhibitor containing a sulfur or nitrogen atom through which it is joined to the .alpha.-ketoimidomethyl blocking group.
A photographic element comprising a support bearing a photosensitive silver halide emulsion having associated therewith an .alpha.-ketoimidomethyl blocked photographic reagent having the structure:
- ##STR19## wherein:
- J represents ##STR20## X represents the atoms to complete a heterocyclic nucleus containing at least one 5- or 6-membered ring;
- R represents alkyl of 1 to 30 carbon atoms or aryl of 6 to 30 carbon atoms;
- and
- PR represents the residue of a development inhibitor containing a sulfur or nitrogen atom through which it is joined to the .alpha.-ketoimidomethyl blocking group.
A photographic element comprising a support having thereon a red-sensitive silver halide emulsion unit having associated therewith a cyan-dye-image-providing material, a green-sensitive silver halide emulsion unit having associated therewith a magenta-dye-image-providing material and a blue-sensitive silver halide emulsion unit having associated therewith a yellow-dye-image providing material, there being associated with at least one of the silver halide emulsion units an .alpha.-ketoimidomethyl blocked photographic reagent having the structure:
- ##STR21## wherein:
- J represents ##STR22## X represents the atoms to complete a heterocyclic nucleus containing at least one 5- or 6-membered ring;
- R represents alkyl of 1 to 30 carbon atoms or aryl of 6 to 30 carbon atoms;
- and
- PR represents the residue of a development inhibitor containing a sulfur or nitrogen atom through which it is joined to the .alpha.-ketoimidomethyl blocking group.
An image transfer cover sheet element capable of being permeated by an alkaline processing composition, comprising a support having thereon a neutralizing layer and a timing layer, the element containing an .alpha.-ketoimidomethyl blocked photographic reagent having the structure:
- ##STR25## wherein:
- J represents ##STR26## X represents the atoms to complete a heterocyclic nucleus containing at least one 5- or 6-membered ring;
- R represents alkyl of 1 to 30 carbon atoms or aryl of 6 to 30 carbon atoms;
- and
- PR represents the residue of a development inhibitor containing a sulfur or nitrogen atom through which it is joined to the .alpha.-ketoimidomethyl blocking group.
Dependencies are inferred from the claim text.