US4459350A
Expired / Lapsed
US
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Photothermographic material and processing comprising a substituted triazine
Assignee: Eastman Kodak Co
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Filing: 1982-09-29
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Granted: 1984-07-10
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Expires: 2002-09-29
Abstract
Abstract A 6-substituted-2,4-bis(trichloromethyl)-s-triazine stabilizer precursor which has a maximum absorption wavelength greater than 320 nanometers and is thermally stable at temperatures up to 150° C. provides improved post-processing stability in a photothermographic silver halide material designed for dry physical development. Such a photothermographic material comprises photographic silver halide and an image forming combination comprising (i) an organic silver salt oxidizing agent, with (ii) a reducing agent for the organic silver salt oxidizing agent. A developed visible image is provided after imagewise exposure by uniformly heating the photothermographic material to moderately elevated temperatures.
Inventors
- 👤 Wojciech M. Przezdziecki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:07
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/494; G03C1/498; G03C1/49836; G03C1/49845; Y; Y10; Y10S; Y10S430/00; Y10S430/156
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
94 words
In a photothermographic element comprising a support having thereon, in reactive association, (a) photographic silver halide, (b) an image forming combination comprising (i) an organic silver salt oxidizing agent, with (ii) a reducing agent for the organic silver salt oxidizing agent, and (c) a silver halide stabilizer precursor, the improvement wherein said stabilizer precursor is a photolytically active 6-substituted-2,4-bis(trichloromethyl)-s-triazine which has a maximum absorption wavelength greater than 320 nm, is thermally stable at temperatures up to 150° C. and is present in a stabilizing concentration sufficient to promote latent image stabilization and post-processing stabilization.
Claim 2
Dependent Claim
94 words
In a photothermographic element comprising a support having thereon, in reactive association, (a) photographic silver halide, (b) an image forming combination comprising (i) an organic silver salt oxidizing agent, with (ii) a reducing agent for the organic silver salt oxidizing agent, and (c) a silver halide stabilizer precursor, the improvement wherein said stabilizer precursor is a photolytically active 6-substituted-2,4-bis(trichloromethyl)-s-triazine which has a maximum absorption wavelength greater than 320 nm, is thermally stable at temperatures up to 150° C. and is present in a stabilizing concentration sufficient to promote latent image stabilization and post-processing stabilization.
Claim 3
Dependent Claim
24 words
A photothermographic element as in claim 1 wherein said stabilizer precursor is a compound selected from the group consisting of ##STR17## and combinations thereof.
Claim 4
Dependent Claim
10 words
A photothermographic element as in claim 1 comprising a toner.
Claim 5
Dependent Claim
26 words
A photothermographic element as in claim 1 comprising a toner which is a compound selected from the group consisting of succinimide, phthalazinone, phthalimide, phthalazine and N-hydroxynaphthalimide.
Claim 6
Dependent Claim
15 words
A photothermographic element as in claim 1 comprising a thermal stabilizer consisting essentially of 2-bromo-2-arylsulfonylacetamide.
Claim 7
Dependent Claim
15 words
A photothermographic element as in claim 1 comprising a thermal stabilizer consisting essentially of 2-bromo-2-p-tolylsulfonylacetamide.
Claim 8
Dependent Claim
10 words
A photothermographic element as in claim 1 comprising a binder.
Claim 9
Dependent Claim
12 words
A photothermographic element as in claim 1 comprising a poly(vinyl butyral) binder.
Claim 10
Dependent Claim
102 words
In a photothermographic element comprising a support having thereon, in a poly(vinyl butyral) binder, in reactive association, (a) photographic silver halide, (b) an image forming combination comprising (i) an organic silver salt oxidizing agent consisting essentially of silver behenate, with (ii) a reducing agent for the organic silver salt oxidizing agent consisting essentially of a sulfonamidophenol silver halide developing agent, (c) a thermal stabilizer consisting essentially of 2-bromo-2-arylsulfonylacetamide, (d) a toner, and (e) a silver halide stabilizer precursor, the improvement wherein said stabilizer precursor is ##STR18## and is present in a stabilizing concentration sufficient to promote latent image stabilization and post-processing stabilization.
Claim 11
Dependent Claim
102 words
In a photothermographic element comprising a support having thereon, in a poly(vinyl butyral) binder, in reactive association, (a) photographic silver halide, (b) an image forming combination comprising (i) an organic silver salt oxidizing agent consisting essentially of silver behenate, with (ii) a reducing agent for the organic silver salt oxidizing agent consisting essentially of a sulfonamidophenol silver halide developing agent, (c) a thermal stabilizer consisting essentially of 2-bromo-2-arylsulfonylacetamide, (d) a toner, and (e) a silver halide stabilizer precursor, the improvement wherein said stabilizer precursor is ##STR18## and is present in a stabilizing concentration sufficient to promote latent image stabilization and post-processing stabilization.
Claim 12
Dependent Claim
39 words
A process of developing an image in an exposed photothermographic element as defined in claim 1 comprising heating said element to a temperature within the range of about 90° C. to about 150° C. until said image is developed.
Claim 13
Dependent Claim
40 words
A process of developing an image in a radiation exposed photothermographic element as defined in claim 9 comprising heating said element to a temperature within the range of about 90° C. to about 150° C. until said image is developed.
Claim 14
Dependent Claim
124 words
In a photothermographic element comprising a support having thereon, in reactive association, (a) photographic silver halide, (b) an image forming combination comprising (i) an organic silver salt oxidizing agent, with (ii) a reducing agent for the organic silver salt oxidizing agent, and (c) a silver halide stabilizer precursor, the improvement wherein said stabilizer precursor is a photolytically active 6-substituted-2,4-bis(trichloromethyl)-s-triazine which has a maximum absorption wavelength greater than 320 nm, is thermally stable at temperatures up to 150° C., is represented by the formula: ##STR19## wherein R is aryl containing 6 to 15 carbon atoms or --CH═CH--R 1 , R 1 is aryl containing 6 to 15 carbon atoms and is present in a stabilizing concentration sufficient to promote latent image stabilization and post-processing stabilization.
Claim 15
Dependent Claim
124 words
In a photothermographic element comprising a support having thereon, in reactive association, (a) photographic silver halide, (b) an image forming combination comprising (i) an organic silver salt oxidizing agent, with (ii) a reducing agent for the organic silver salt oxidizing agent, and (c) a silver halide stabilizer precursor, the improvement wherein said stabilizer precursor is a photolytically active 6-substituted-2,4-bis(trichloromethyl)-s-triazine which has a maximum absorption wavelength greater than 320 nm, is thermally stable at temperatures up to 150° C., is represented by the formula: ##STR19## wherein R is aryl containing 6 to 15 carbon atoms or --CH═CH--R 1 , R 1 is aryl containing 6 to 15 carbon atoms and is present in a stabilizing concentration sufficient to promote latent image stabilization and post-processing stabilization.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-10 | 1988-01-09 | 1988-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-10 | 1992-01-09 | 1992-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-10 | 1996-01-09 | 1996-07-10 | $7700.00 | Window Closed / Lapsed |