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US 4,273,860 AGranted
Inhibition of image formation utilizing cobalt(III) complexes
AssigneeEastman Kodak Company
InventorAnthony Adin
Life of this patent
Estimating the term…
Abstract
There is disclosed a cobalt(III) complex-containing photographic composition, element and process which can be made negative-working or positive-working. Featured are an exposure activatible image precursor composition and a photoinhibitor composition capable of inhibiting image formation in the image precursor composition.
Claims50
In an imaging element comprising, in one or more operatively associated layers,
- an energy-activatible image precursor composition including at least a cobalt(III) complex containing releasable ligands selected from amines, dimethylglyoxime, ethyl, aquo, chloro, bromo, acetylacetonato, nitro, and superoxo, and an image-forming material capable of generating an image in response to the release of said ligands;
- the improvement comprising, in reactable association with said precursor composition, a photoinhibitor composition capable of inhibiting said ligand release upon exposure to activating radiation of a wavelength longer than about 300 nm, said photoinhibitor composition containing a photolytic acid-generating compound.
In an imaging element comprising, in one or more operatively associated layers,
- an energy-activatible image precursor composition including at least a cobalt(III) complex containing releasable liqands selected from amines, dimethylglyoxime, ethyl, aquo, chloro, bromo, acetylacetonato, nitro, and superoxo, an image-forming material capable of generating an image in response to the release of said ligands, and a reducing agent precursor capable of producing a reducing agent for said complex in response to a thermal exposure;
- the improvement comprising, in reactable association with said composition, a photoinhibitor composition capable of inhibiting said liqand release upon exposure to activating radiation of a wavelength longer than about 300 nm, said photoinhibitor composition containing a photolytic acid-generating compound.
In a radiation-sensitive element comprising in one or more operatively associated layers,
- a heat-activatible image precursor composition including at least a cobalt(III) complex containing releasable ligands selected from amines, dimethylglyoxime, ethyl, aquo, chloro, bromo, acetylacetonato, nitro, and superoxo, and an image-forming material capable of generating an image in response to the release of said ligands;
- the improvement comprising, in reactable association with said precursor composition, a photoinhibitor composition capable of inhibiting said ligand release upon exposure to activating radiation of a wavelength longer than about 300 nm, said photoinhibitor composition containing a photolytic acid-generating compound.
In an imaging element comprising, in one or more operatively associated layers,
- a reducible cobalt(III) complex containing amine ligands, o-phthalaldehyde, and a quinone photoreductant capable of reducing said complex upon exposure to activating radiation;
- the improvement wherein said element further includes an S-triazine having the formula:
- ##STR43## wherein:
- R is hydrogen, halide, nitro or alkyl, dialkylamino, or alkoxy containing from 1 to 5 carbon atoms in the alkyl portion,
- R.sup.1 is hydrogen or alkoxy containing from 1 to 5 carbon atoms in the alkyl portion,
- R.sup.2 is hydrogen or alkoxy containing from 1 to 5 carbon atoms in the alkyl portion, or together with R.sup.3 comprises the necessary nonmetallic atoms to complete an aromatic ring;
- R.sup.3 is hydrogen, or together with R.sup.2 comprises the necessary nonmetallic atoms to complete an aromatic ring;
- X and Y are the same or different, and are each selected from the group consisting of halide and hydrogen, at least one of X and Y being halide.
5 more elements
In an energy-activatible image precursor composition comprising
- at least a cobalt(III) complex containing releasable ligands selected from amines, dimethylglyoxime, ethyl, aquo, chloro, bromo, acetylacetonato, nitro, and superoxo, and an image-forming material capable of generating an image in response to the release of said ligands;
- the improvement comprising, in reactable association with said precursor composition, a photoinhibitor composition capable of inhibiting said ligand release upon exposure to activating radiation of a wavelength longer than about 300 nm, said photoinhibitor composition containing a photolytic acid-generating compound.
In an imaging element comprising, in one or more operatively associated layers,
- an energy-activatible image precursor composition including at least a cobalt(III) complex containing releasable ligands selected from amines, dimethylglyoxime, ethyl, aquo, chloro, bromo, acetylacetonato, nitro, and superoxo, and an image-forming material capable of generating an image in response to the release of said ligands;
- the improvement comprising, in reactable association with said precursor composition, a photoinhibitor composition which, upon exposure to activating radiation of a wavelength longer than about 300 nm, inhibits said ligand release, said photoinhibitor composition containing a photolytic acid-generating compound.
A process for forming a negative or positive image in an imaging element comprising, in one or more operatively associated layers,
- an energy-activatible image precursor composition including at least a cobalt(III) complex containing releasable ligands selected from amines, dimethylglyoxime, ethyl, aquo, chloro, bromo, acetylacetonato, nitro, and superoxo, and an image-forming material capable of generating an image in response to the release of said ligands, and in reactable association with said precursor composition, a photoinhibitor composition capable of inhibiting said ligand release upon exposure to activating radiation of a wavelength longer than about 300 nm, said photoinhibitor composition containing a photolytic acid-generating compound;
- the process comprising the steps of:
- (a) imagewise activating by selective exposure, one of said image precursor composition and said photoinhibitor composition, whereby either ligands are released or are inhibited from release;
- and
- (b) overall activating by exposure the other of said compositions, whereby a negative image or a positive image is produced, respectively.
2 more elements
A process for forming a positive image in an imaging element comprising, in one or more operatively associated layers,
- an energy-activatible image precursor composition including at least a cobalt(III) complex containing releasable ligands selected from amines, dimethylglyoxime, ethyl, aquo, chloro, bromo, acetylacetonato, nitro, and superoxo, and an image-forming material capable of generating an image in response to the release of said ligands, and in reactable association with said precursor composition, a photoinhibitor composition capable of inhibiting said ligand release upon exposure to activating radiation of a wavelength longer than about 300 nm, said photoinhibitor composition containing a photolytic acid-generating compound;
- the process comprising the steps of:
- (a) imagewise exposing said element to said activating radiation to inhibit release of said ligands;
- and
- (b) overall activating, by exposure to electromagnetic energy, said precursor composition to release said ligands in the portions of said element not exposed to said activating radiation.
2 more elements
A process for forming a negative image in an imaging element comprising, in one or more operatively associated layers,
- an energy-activatible image precursor composition including at least a cobalt(III) complex containing releasable ligands selected from amines, dimethylglyoxime, ethyl, aquo, chloro, bromo, acetylacetonato, nitro, and superoxo, and an image-forming material capable of generating an image in response to the release of said ligands, and in reactable association with said precursor composition, a photoinhibitor composition capable of inhibiting said ligand release upon exposure to activating radiation of a wavelength longer than about 300 nm, said photoinhibitor composition containing a photolytic acid-generating compound;
- the process comprising the steps of:
- (a) imagewise selectively activating by exposure to electromagnetic energy, said image precursor composition, to release said ligands imagewise;
- and
- (b) overall exposing said element to said activating exposure to inhibit release of ligands in the areas not exposed by the previous step.
2 more elements
A process for forming a negative or positive image in an imaging element, comprising first imagewise activating by selective exposure either
- (a) an image precursor composition in one or more layers, which includes at least a cobalt(III) complex containing releasable ligands selected from amines, dimethylglyoxime, ethyl, aquo, chloro, bromo, acetylacetonato, nitro, and superoxo, and an image-forming material which generates an image in response to release of said ligands, or
- (b) a layer of a photoinhibitor composition associated with said precursor composition, said photoinhibitor composition being activatible by radiation of a wavelength longer than about 300 nm to inhibit said ligand release and containing a photolytic acid-generating compound.
- and then overall activating by exposure the other of said compositions not imagewise activated.
A process for forming a negative image in an imaging element, comprising
- (a) imagewise activating by selective exposure an image precursor composition in one or more layers, which includes at least a cobalt(III) complex containing releasable ligands selected from amines, dimethylglyoxime, ethyl, aquo, chloro, bromo, acetylacetonato, nitro, and superoxo, and an image-forming material which generates an image in response to release of said ligands, and
- (b) activating by overall exposure to radiation of a wavelength longer than 300 nm, a layer of a photoinhibitor composition associated with said precursor composition and containing a photolytic acid-generating compound that inhibits said ligand release upon said overall exposure.
Dependencies are inferred from the claim text.