Colorless ligand-releasing monomers and polymers and their use to provide dyes with metal ions

Claim 2

A photographic element comprising a support having thereon at least one silver halide emulsion layer having associated therewith an essentially colorless, hydrophilic ligand-releasing polymer comprising (a) recurring units derived from an ethylenically unsaturated polymerizable hydrophilic monomer in a number sufficient to render said polymer hydrophilic, and (b) recurring units derived from an ethylenically unsaturated polymerizable monomer represented by the structure: ##STR26## wherein R' is hydrogen or lower alkyl, COUP is a photographic color coupling moiety, LINK is a coupling-off group which can be cleaved from COUP by an oxidized developer composition, and LIG is a ligand capable of complexing with metal ions, while joined to said polymer, to form a dye in the unexposed areas of said element.

Claim 3

The element of claim 1 further comprising a compound associated with said emulsion layer which is capable, upon development, of providing a dye image in exposed areas of said element.

Claim 4

The element of claim 1 wherein LIG is derived from a compound having the structure: ##STR27## wherein m is 0 or a positive integer of 1 to 3, n and p are independently 0 or 1, represents a single or double bond, Z is R 1 --N═, O═, S═, R 1 --P═, (R 1 ) 2 P-- or (R 1 ) 3 P═, and when Z is (R 1 ) 2 P--, n is 1, otherwise n is 0, R 1 , R 2 , R 3 , R 4 , R 5 and R 6 are independently hydrogen, amino, hydroxy, mercapto, alkoxy, alkyl, aryl or a heterocyclic moiety, and when R 6 is so defined, p is 1 and is a single bond, if m is 0, R 1 and R 2 , R 2 and R 3 , and R 3 and R 4 , taken together, can independently represent the carbon and heteroatoms necessary to complete a substituted or unsubstituted carbocyclic or heterocyclic nucleus, or, if m is 1 to 3, R 1 and R 2 , R 5 and R 6 , and R 3 and R 4 , taken together, can independently represent the carbon and heteroatoms necessary to complete a substituted or unsubstituted heterocyclic nucleus, and when R 5 and R 6 are so defined, p is 0 when is a double bond, and p is 1 when is a single bond.

Claim 5

The element of claim 3 wherein m is 0 or 1 and Z is R 1 --N═.

Claim 6

The element of claim 1 comprising 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 silver halide material, and wherein said ligand-releasing polymer is associated with at least one of said units.

Claim 7

The element of claim 5 wherein said ligand-releasing polymer provides a magenta dye in said unexposed areas when complexed with metal ions.

Claim 8

The element of claim 1 wherein said ligand-releasing polymer forms a dye with ferrous ions.

Claim 9

The element of claim 1 wherein said ligand-releasing polymer is poly{{{N-{{4-chloro-3-{4,4-dimethyl-2-[2,6-di(2-pyridyl)-4-pyridyloxy]-3-oxopentanamido}phenyl}}acrylamide-co-sodium 2-acrylamido-2-methylpropane-1-sulfonate}}}, poly{{{N-{{4-chloro-3-{4,4-dimethyl-2-[2,6-di(2-pyridyl)-4-(4-pyridyl)phenoxy]-3-oxopentanamido}phenyl}}acrylamide-co-sodium 2-acrylamido-2-methylpropane-1-sulfonate}}}, and poly{{{{N-{{{4-chloro-3-{{4,4-dimethyl-2-{4-[6-phenyl-3-(2-pyridyl)-5-as-triazinyl]-phenoxy}-3-oxopehtanamido}}phenyl}}}acrylamide-co-sodium 2-acrylamido-2-methylpropane-1-sulfonate}}}}.

Claim 10

A process of dye formation in an imagewise exposed element of claim 1, said process comprising the steps of: a. developing the imagewise exposed areas of said element with a color developing agent, thereby cleaving LINK-LIG from said polymer and washing substantially all of cleaved LINK-LIG out of said element, and b. treating said element with metal ions to form a dye with said ligand-releasing polymer in the unexposed areas of said element.

Claim 11

The process of claim 8 wherein said metal ions are ferrous ions.