US3871887A
Expired / Lapsed
US
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Photothermographic composition, element and process
Assignee: Eastman Kodak Co
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Filing: 1974-01-02
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Granted: 1975-03-18
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Expires: 1994-01-02
Abstract
Abstract Improved sensitivity to certain wavelengths of light and improved contrast are provided by certain photothermographic compositions containing a sensitizing concentration of a nonsilver iodide salt. Such photothermographic compositions, prepared by (A) preparing a dispersion of (a) an oxidationreduction image-forming combination comprising (i) a silver salt oxidizing agent and (ii) an organic reducing agent, with (b) ex situ, synthetic polymer-peptized photosensitive silver halide, (c) a cyclic imide toner in (d) a non-gelatin polymeric binder, contain a sensitizing concentration of a non-silver iodide salt, such as lithium iodide. The described non-silver iodide salt can be mixed with described photothermographic compositions at different stages of preparation of the compositions.
Inventors
- 👤 Cynthia G Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:37
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/494; G03C1/498; G03C1/49836; G03C1/49845; Y; Y10; Y10S; Y10S430/00; Y10S430/166
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
82 words
IN A METHOD OF PREPARING A PHOTOTHERMOGRAPHIC COMPOSITION COMPRISING: A. PREPARING A DISPERSION OF: A. AN OXIDATION-REDUCTION IMAGE-FORMING COMBINATION COMPRISING: I. A SILVER SALT OXIDIZING AGENT AND II. AN ORGANIC REDUCING AGENT WITH: B. A SYNTHETIC POLYMER-PEPTIZED PHOTOSENSITIVE SILVER HALIDE, AND C. A CYCLIC IMIDE TONER IN D. A NON-GELATIN POLYMERIC BINDER, THE IMPROVEMENT COMPRISING: B. MIXING WITH SAID DISPERSION A SENSITIZING CONCENTRATION OF A NON-SILVER IODIDE SALT, SAID IODIDE SALT HAVING THE PROPERTY OF INCREASING THE PHOTOSENSITIVITY OF SAID PHOTOTHERMOGRAPHIC COMPOSITION.
Claim 2
Dependent Claim
82 words
IN A METHOD OF PREPARING A PHOTOTHERMOGRAPHIC COMPOSITION COMPRISING: A. PREPARING A DISPERSION OF: A. AN OXIDATION-REDUCTION IMAGE-FORMING COMBINATION COMPRISING: I. A SILVER SALT OXIDIZING AGENT AND II. AN ORGANIC REDUCING AGENT WITH: B. A SYNTHETIC POLYMER-PEPTIZED PHOTOSENSITIVE SILVER HALIDE, AND C. A CYCLIC IMIDE TONER IN D. A NON-GELATIN POLYMERIC BINDER, THE IMPROVEMENT COMPRISING: B. MIXING WITH SAID DISPERSION A SENSITIZING CONCENTRATION OF A NON-SILVER IODIDE SALT, SAID IODIDE SALT HAVING THE PROPERTY OF INCREASING THE PHOTOSENSITIVITY OF SAID PHOTOTHERMOGRAPHIC COMPOSITION.
Claim 3
Dependent Claim
29 words
A method as in claim 1 wherein said sensitizing concentration is about 0.01 mole to about 0.50 mole of said iodide salt per mole of said photosensitive silver halide.
Claim 4
Dependent Claim
34 words
A method as in claim 1 wherein said iodide salt is a compound selected from the group consisting of lithium iodide, potassium iodide, sodium iodide and ammonium iodide and combinations of these iodide compounds.
Claim 5
Dependent Claim
11 words
A method as in claim 1 wherein said toner comprises succinimide.
Claim 6
Dependent Claim
38 words
A method as in claim 1 of preparing a photothermographic composition also comprising, after said mixing, holding the resulting composition for about 10 seconds to about 48 hours at about 20*C. to about 30*C. before any subsequent step.
Claim 7
Independent Claim
75 words
A method of preparing a photothermographic composition comprising A. preparing a dispersion of: a. an oxidation-reduction image-forming combination comprising i. silver behenate and ii. a sulfonamidophenol reducing agent with: b. a cyclic imide toner comprising succinimide, c. a poly(vinyl butyral) peptized silver halide in d. a poly(vinyl butyral) binder, and, after preparing said dispersion: B. mixing with said dispersion about 0.01 mole to about 0.50 mole of lithium iodide per mole of said silver halide.
Claim 8
Independent Claim
75 words
A method of preparing a photothermographic composition comprising A. preparing a dispersion of: a. an oxidation-reduction image-forming combination comprising i. silver behenate and ii. a sulfonamidophenol reducing agent with: b. a cyclic imide toner comprising succinimide, c. a poly(vinyl butyral) peptized silver halide in d. a poly(vinyl butyral) binder, and, after preparing said dispersion: B. mixing with said dispersion about 0.01 mole to about 0.50 mole of lithium iodide per mole of said silver halide.
Claim 9
Independent Claim
99 words
A method of preparing a photothermographic composition comprising: A. preparing a dispersion of: a. an oxidation-reduction image-forming combination comprising: i. silver behenate and ii. 4-benzenesulfonamidophenol and 2,4-dihydroxybenzophenone, and b. a cyclic imide toner comprising succinimide, c. poly(vinyl butyral) peptized silver bromide in d. a poly(vinyl butyral) binder, and, after preparing said dispersion, B. mixing with said dispersion about 0.01 mole to about 0.05 mole of lithium iodide per mole of said silver bromide, and then C. holding the resulting photothermographic composition for about 60 minutes to about 4 hours at about 20*C. to about 30*C. before any subsequent step.
Claim 10
Independent Claim
99 words
A method of preparing a photothermographic composition comprising: A. preparing a dispersion of: a. an oxidation-reduction image-forming combination comprising: i. silver behenate and ii. 4-benzenesulfonamidophenol and 2,4-dihydroxybenzophenone, and b. a cyclic imide toner comprising succinimide, c. poly(vinyl butyral) peptized silver bromide in d. a poly(vinyl butyral) binder, and, after preparing said dispersion, B. mixing with said dispersion about 0.01 mole to about 0.05 mole of lithium iodide per mole of said silver bromide, and then C. holding the resulting photothermographic composition for about 60 minutes to about 4 hours at about 20*C. to about 30*C. before any subsequent step.
Claim 11
Independent Claim
85 words
A method of preparing a silver halide photothermographic composition comprising respectively A. preparing a dispersion of silver behenate in poly(vinyl butyral), B. mixing with the resulting silver behenate dispersion about 0.01 to about 0.05 mole of lithium iodide per mole of silver halide in the photothermographic composition, C. mixing with the resulting composition an ex situ, poly(vinyl butyral) peptized photosensitive silver halide, and D. a poly(vinyl butyral) binder, and E. mixing succinimide, a sulfonamidophenol reducing agent and a spectral sensitizing dye with the resulting composition.
Claim 12
Independent Claim
85 words
A method of preparing a silver halide photothermographic composition comprising respectively A. preparing a dispersion of silver behenate in poly(vinyl butyral), B. mixing with the resulting silver behenate dispersion about 0.01 to about 0.05 mole of lithium iodide per mole of silver halide in the photothermographic composition, C. mixing with the resulting composition an ex situ, poly(vinyl butyral) peptized photosensitive silver halide, and D. a poly(vinyl butyral) binder, and E. mixing succinimide, a sulfonamidophenol reducing agent and a spectral sensitizing dye with the resulting composition.
Claim 13
Independent Claim
72 words
A method of preparing a silver halide photothermographic composition comprising respectively A. preparing poly(vinyl butyral) peptized photosensitive silver halide, B. mixing with said silver halide about 0.01 to about 0.05 mole of lithium iodide per mole of said silver halide, C. mixing with the resulting composition a dispersion of silver behenate in poly(vinyl butyral), and D. then mixing succinimide, a sulfonamidophenol reducing agent and a spectral sensitizing dye with the resulting composition.
Claim 14
Independent Claim
72 words
A method of preparing a silver halide photothermographic composition comprising respectively A. preparing poly(vinyl butyral) peptized photosensitive silver halide, B. mixing with said silver halide about 0.01 to about 0.05 mole of lithium iodide per mole of said silver halide, C. mixing with the resulting composition a dispersion of silver behenate in poly(vinyl butyral), and D. then mixing succinimide, a sulfonamidophenol reducing agent and a spectral sensitizing dye with the resulting composition.
Claim 15
Dependent Claim
114 words
In a method of preparing a photothermographic element comprising: A. preparing a dispersion of: a. an oxidation-reduction image-forming combination comprising: i. a silver salt oxidizing agent and ii. an organic reducing agent with: b. synthetic polymer-peptized photosensitive silver halide, and c. a cyclic imide toner in d. a non-gelatin polymeric binder, the improvement comprising, after preparing said dispersion B. mixing with said dispersion a sensitizing concentration of a non-silver iodide salt, said iodide salt having the property of increasing the photosensitivity of said photothermographic composition, C. holding the resulting composition for about 10 seconds to about 48 hours at about 20*C. to about 30*c. and then D. coating the photothermographic composition on a support.
Claim 16
Dependent Claim
114 words
In a method of preparing a photothermographic element comprising: A. preparing a dispersion of: a. an oxidation-reduction image-forming combination comprising: i. a silver salt oxidizing agent and ii. an organic reducing agent with: b. synthetic polymer-peptized photosensitive silver halide, and c. a cyclic imide toner in d. a non-gelatin polymeric binder, the improvement comprising, after preparing said dispersion B. mixing with said dispersion a sensitizing concentration of a non-silver iodide salt, said iodide salt having the property of increasing the photosensitivity of said photothermographic composition, C. holding the resulting composition for about 10 seconds to about 48 hours at about 20*C. to about 30*c. and then D. coating the photothermographic composition on a support.
Claim 17
Dependent Claim
34 words
A method as in claim 10 of preparing a photothermographic element wherein said sensitizing concentration is about 0.01 mole to about 0.50 mole of said iodide salt per mole of said photosensitive silver halide.
Claim 18
Dependent Claim
33 words
A method as in claim 10 wherein said iodide salt is a compound selected from the group consisting of lithium iodide, potassium iodide, sodium iodide, ammonium iodide and combinations of these iodide compounds.
Claim 19
Independent Claim
99 words
A method of preparing a photothermographic element comprising: A. preparing a dispersion of: a. an oxidation-reduction image-forming combination comprising: i. silver behenate and ii. 4-benzenesulfonamidophenol and 2,4-dihydroxybenzophenone, and b. poly(vinyl butyral) peptized silver halide in c. a poly(vinyl butyral) binder, and, after preparing said dispersion: B. mixing with said dispersion about 0.15 mole to about 0.30 mole of lithium iodide per mole of said silver bromide, then C. holding the resulting photothermographic composition for about 60 minutes to about 4 hours at about 20* C. to about 30* C., and then D. coating the photothermographic composition on a support.
Claim 20
Independent Claim
99 words
A method of preparing a photothermographic element comprising: A. preparing a dispersion of: a. an oxidation-reduction image-forming combination comprising: i. silver behenate and ii. 4-benzenesulfonamidophenol and 2,4-dihydroxybenzophenone, and b. poly(vinyl butyral) peptized silver halide in c. a poly(vinyl butyral) binder, and, after preparing said dispersion: B. mixing with said dispersion about 0.15 mole to about 0.30 mole of lithium iodide per mole of said silver bromide, then C. holding the resulting photothermographic composition for about 60 minutes to about 4 hours at about 20* C. to about 30* C., and then D. coating the photothermographic composition on a support.
Claim 21
Independent Claim
111 words
A method of preparing a photothermographic element comprising respectively A. preparing a dispersion of silver behenate in poly(vinyl butyral), B. mixing with the resulting silver behenate dispersion about 0.01 to about 0.05 mole of lithium iodide per mole of silver halide in the photothermographic composition, C. mixing with the resulting composition a poly(vinyl butyral) peptized photosensitive silver halide, and D. a poly(vinyl butyral) binder, E. mixing succinimide, a sulfonamidophenol reducing agent and a spectral sensitizing dye with the resulting composition, then F. holding the resulting photothermographic composition for about 60 minutes to about 4 hours at about 20*C. to about 30*C., and then G. coating the photothermographic composition on a support.
Claim 22
Independent Claim
111 words
A method of preparing a photothermographic element comprising respectively A. preparing a dispersion of silver behenate in poly(vinyl butyral), B. mixing with the resulting silver behenate dispersion about 0.01 to about 0.05 mole of lithium iodide per mole of silver halide in the photothermographic composition, C. mixing with the resulting composition a poly(vinyl butyral) peptized photosensitive silver halide, and D. a poly(vinyl butyral) binder, E. mixing succinimide, a sulfonamidophenol reducing agent and a spectral sensitizing dye with the resulting composition, then F. holding the resulting photothermographic composition for about 60 minutes to about 4 hours at about 20*C. to about 30*C., and then G. coating the photothermographic composition on a support.
Claim 23
Independent Claim
97 words
A method of preparing a photothermographic element comprising respectively A. preparing poly(vinyl butyral) peptized photosensitive silver halide, B. mixing with said silver halide about 0.01 to about 0.05 mole of lithium iodide per mole of said silver halide, C. mixing with the resulting composition a dispersion of silver behenate in poly(vinyl butyral), D. mixing succinimide, a sulfonamidophenol reducing agent and a spectral sensitizing dye with resulting composition, E. holding the resulting photothermographic composition for about 60 minutes to about 4 hours at about 20*C. to about 30*C. and then F. coating the photothermographic composition on a support.
Claim 24
Independent Claim
97 words
A method of preparing a photothermographic element comprising respectively A. preparing poly(vinyl butyral) peptized photosensitive silver halide, B. mixing with said silver halide about 0.01 to about 0.05 mole of lithium iodide per mole of said silver halide, C. mixing with the resulting composition a dispersion of silver behenate in poly(vinyl butyral), D. mixing succinimide, a sulfonamidophenol reducing agent and a spectral sensitizing dye with resulting composition, E. holding the resulting photothermographic composition for about 60 minutes to about 4 hours at about 20*C. to about 30*C. and then F. coating the photothermographic composition on a support.
Claim 25
Dependent Claim
69 words
In a photothermographic composition comprising the combination of: a. an oxidation-reduction image-forming combination comprising: i. a silver salt oxidizing agent with ii. an organic reducing agent, b. a synthetic polymer-peptized photosensitive silver halide, and c. a cyclic imide toner in a polymeric binder, the improvement comprising: d. a sensitizing concentration of a non-silver iodide salt, said iodide salt having the property of increasing the photosensitivity of said photothermographic composition.
Claim 26
Dependent Claim
69 words
In a photothermographic composition comprising the combination of: a. an oxidation-reduction image-forming combination comprising: i. a silver salt oxidizing agent with ii. an organic reducing agent, b. a synthetic polymer-peptized photosensitive silver halide, and c. a cyclic imide toner in a polymeric binder, the improvement comprising: d. a sensitizing concentration of a non-silver iodide salt, said iodide salt having the property of increasing the photosensitivity of said photothermographic composition.
Claim 27
Dependent Claim
30 words
A photothermographic composition as in claim 16 wherein said sensitizing concentration is about 0.01 mole to about 0.50 mole of said iodide salt per mole of said photosensitive silver halide.
Claim 28
Dependent Claim
34 words
A photothermographic composition as in claim 16 wherein said iodide salt is a compound selected from the group consisting of lithium iodide, potassium iodide, sodium iodide, ammonium iodide and combinations of these iodide compounds.
Claim 29
Dependent Claim
12 words
A photothermographic composition as in claim 16 wherein said toner comprises succinimide.
Claim 30
Dependent Claim
61 words
In a photothermographic composition comprising the combinAtion of: a. an oxidation-reduction image-forming combination comprising: i. silver behenate with ii. a sulfonamidophenol reducing agent with b. poly(vinyl butyral) peptized silver halide, c. succinimide, and d. a poly(vinyl butyral) binder for said composition, the improvement comprising: e. about 0.01 mole to about 0.05 mole of lithium iodide per mole of said silver halide.
Claim 31
Dependent Claim
61 words
In a photothermographic composition comprising the combinAtion of: a. an oxidation-reduction image-forming combination comprising: i. silver behenate with ii. a sulfonamidophenol reducing agent with b. poly(vinyl butyral) peptized silver halide, c. succinimide, and d. a poly(vinyl butyral) binder for said composition, the improvement comprising: e. about 0.01 mole to about 0.05 mole of lithium iodide per mole of said silver halide.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |