Non-silver imaging compositions having improved speeds and processing temperatures
AssigneeEastman Kodak Company
InventorThap DoMinh
Life of this patent
Estimating the term…
Abstract
There are disclosed an imaging composition, element and method featuring an aromatic dialdehyde that reacts with an exposure-generated amine to form a dye. The photographic speed of the reaction is improved by incorporating into the composition an imide capable of providing an ##STR1## moiety when heated.
Claims33
In an imaging composition comprising an energy-activatible material capable of generating amines by reduction, said material including a source of said amines that releases said amines when reduced, and a photoreductant capable of producing a reducing agent for said source when exposed to activating energy;
- and an aromatic dialdehyde that reacts with said amines to form a dye;
- the improvement wherein said composition further includes an imide capable of providing an NH moiety when heated, said imide being present in an amount sufficient to provide to said composition, when coated, dried and exposed to light, a speed that is at least 0.15 log E faster than the speed of an identical composition lacking said imide.
In an imaging composition comprising an energy-activatible material capable of generating amines by reduction, said material including a source of said amines that releases said amines when reduced, and a photoreductant capable of producing a reducing agent for said source when exposed to activating energy;
- and an aromatic dialdehyde that reacts with said amines to form a dye;
- the improvement wherein said composition further includes an imide represented by the structural formula ##STR21## wherein R.sup.1 and R.sup.2 are each individually alkyl of 1 to 5 carbon atoms, or together comprise the atoms necessary to complete 1, 2 or 3 rings containing from 5 to 12 nuclear atoms,
- R.sup.3 is hydrogen or a heat-removable blocking group;
- Y is ##STR22## and X is O or S;
- said imide being present in an amount sufficient to provide to said composition, when coated, dried and exposed to light, a speed that is at least 0.15 log E faster than the speed of an identical composition lacking said imide.
In an imaging composition comprising a reducible cobalt(III) complex containing releasable amine ligands the release of which is initiated by activating radiation, a photoreductant capable of producing a reducing agent for said complex when exposed to said activating radiation, and o-phthalaldehyde;
- the improvement wherein said composition further includes an imide selected from the group consisting of succinimide;
- 2-methylsuccinimide;
- phthalimide;
- dithiouracil;
- 5-methyl-5-n-pentylhydantoin;
- 5,5-dimethyloxazolidine-2,4-dione;
- 4-nitrophthalimide;
- 3-nitrophthalimide;
- 3-(p-benzylsulfonamido)phthalimide;
- 2,3,4,5-tetrachlorophthalimide;
- and diphenylhydantoin;
- said imide being present in an amount sufficient to provide to said composition, when coated, dried and exposed to light, a speed that is at least 0.15 log E faster than the speed of an identical composition lacking said imide.
In a method of forming an image comprising imagewise exposing to activating energy a composition comprising a material capable of generating amines by reduction, said material including a source of said amines that releases said amines when reduced and a photoreductant capable of producing a reducing agent for said source when exposed to activating energy, and an aromatic dialdehyde that reacts with said amines to form a dye;
- and thereafter heating said composition;
- the improvement wherein said composition further includes an imide capable of providing an ##STR23## moiety when heated, said imide being present in an amount sufficient to provide to said composition, when coated, dried and exposed to light, a speed that is at least 0.15 log E faster than the speed of an identical composition lacking said imide.
A method of increasing the speed of a radiation image-forming composition comprising an energy-activatible material capable of generating amines by reduction, said material including a source of said amines that releases said amines when reduced, and a photoreductant capable of producing a reducing agent for said source when exposed to activating energy;
- and an aromatic dialdehyde that reacts with said amines to form a dye, said method comprising the step of adding to said composition an imide capable of providing an ##STR24## moiety when heated, said imide being present in an amount sufficient to provide to said composition, when coated, dried and exposed to light, a speed that is at least 0.15 log E faster than the speed of an identical composition lacking said imide.
Dependencies are inferred from the claim text.