Inhibitor barrier layers for photographic materials
AssigneeEastman Kodak Company
InventorsEdmund Thompson Holmes, Gerald Allan Campbell
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Abstract
A photographic element comprises a support, a silver halide emulsion layer and a layer containing a polymeric scavenger for development inhibitors. The movement of development inhibitor anions from layer to layer in a film, out of the film, or into the film from processing solutions, can be controlled by the presence of the polymeric scavenger layer.
Claims19
A photographic element comprising a support having at least one layer containing a silver halide emulsion and at least one layer containing a development inhibitor scavenger, and wherein no acid dye or acid dye precursor is present, the improvement wherein said development inhibitor scavenger is a crosslinked polymer comprising units represented by the formula:
- ##STR19## wherein A is a polymerized monomer containing at least two ethylenically unsaturated groups;
- B is a polymerized copolymerizable .alpha., .beta.-ethylenically unsaturated monomer;
- Q is N or P;
- R.sup.1, r.sup.2 and R.sup.3 are independently selected from the group consisting of carbocyclic, alkyl, aryl and aralkyl and wherein R.sup.1, R.sup.2 and R.sup.3 can, together with Q, form a heterocyclic ring;
- M.sup.- is an anion;
- x is from about 0.25 to about 5 mole percent;
- y is from about 0 to about 90 mole percent;
- and
- z is from about 10 to about 99 mole percent.
A process for forming a visible photographic image comprising developing an exposed photographic element wherein no acid dye or acid dye precursor is present, said element comprising a support and a photogtaphic silver halide emulsion layer and integral with said photographic element, a development inhibitor scavenger comprising a crosslinked polymer comprising units represented by the formula:
- ##STR21## wherein A is a polymerized monomer containing at least two ethylenically unsaturated groups;
- B is a polymerized copolymerizable .alpha.,.beta.-ethylenically unsaturated monomer;
- Q is N or P;
- R.sup.1, r.sup.2 and R.sup.3 are independently selected from the group consisting of carbocyclic, alkyl, aryl and aralkyl and wherein R.sup.1, R.sup.2 and R.sup.3 can, together with Q, form a heterocyclic ring;
- M.sup.- is an anion;
- x is from about 0.25 to about 5 mole percent;
- y is from about 0 to about 90 mole percent;
- and
- z is from about 10 to about 99 mole percent.
A multilayer color photographic element wherein no acid dye or acid dye precursor is present, said element comprising a support having thereon at least (1) a red-sensitive coupler-containing silver halide emulsion layer, (2) a green-sensitive coupler-containing emulsion layer, (3) a blue-sensitive coupler-containing layer and (4) a layer containing a crosslinked polymer which comprises units represented by the formula ##STR23## wherein A is a polymerized monomer containing at least two ethylenically unsaturated groups;
- B is a polymerized copolymerizable .alpha.,.beta.-ethylenically unsaturated monomer;
- Q is N or P;
- R.sup.1, r.sup.2 and R.sup.3 are independently selected from the group consisting of carbocyclic, alkyl, aryl and aralkyl and wherein R.sup.1, R.sup.2 and R.sup.3 can, together with Q, form a heterocyclic ring;
- M is an anion;
- x is from about 0.25 to about 5 mole percent;
- y is from about 0 to about 90 mole percent;
- and
- z is from about 10 to about 99 mole percent.
Dependencies are inferred from the claim text.