US3885965A
Expired / Lapsed
US
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Photothermographic element, composition and process
Assignee: Eastman Kodak Co
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Filing: 1973-09-04
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Granted: 1975-05-27
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Expires: 1993-09-04
Abstract
Abstract In a photothermographic element and composition a poly(dimethylsiloxane) provides resistance to ''''orange peel'''' effects. The photothermographic material can be processed after imagewise exposure by merely overall heating the material.
Inventors
- 👤 Donald J Hughes
- 👤 Cynthia G Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:36
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/494; G03C1/498; G03C1/49836; G03C1/49863
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
55 words
In a photothermographic element comprising a support having thereon a photothermographic layer comprising (a) a photosensitive silver salt, (b) a polymeric, hydrophobic binder and (c) a coating aid, the improvement comprising as said coating aid about 0.001 to about 1.0 percent by weight of said layer of a poly(dimethylsiloxane) having units represented by the formula:
Claim 2
Dependent Claim
55 words
In a photothermographic element comprising a support having thereon a photothermographic layer comprising (a) a photosensitive silver salt, (b) a polymeric, hydrophobic binder and (c) a coating aid, the improvement comprising as said coating aid about 0.001 to about 1.0 percent by weight of said layer of a poly(dimethylsiloxane) having units represented by the formula:
Claim 3
Dependent Claim
16 words
A photothermographic element as in claim 1 wherein said coating aid is a siloxane oxymethylene copolymer.
Claim 4
Dependent Claim
64 words
A photothermographic element comprising a support having thereon a layer comprising a. an oxidation-reduction image-forming combination comprising i. a silver salt oxidizing agent with ii. an organic reducing agent, b. photosensitive silver halide, c. a polymeric, hydrophobic binder, d. an activator-toning agent, and e. about 0.001 to about 1.0 percent by weight of said layer of a poly(dimethylsiloxane) having units represented by the formula:
Claim 5
Dependent Claim
64 words
A photothermographic element comprising a support having thereon a layer comprising a. an oxidation-reduction image-forming combination comprising i. a silver salt oxidizing agent with ii. an organic reducing agent, b. photosensitive silver halide, c. a polymeric, hydrophobic binder, d. an activator-toning agent, and e. about 0.001 to about 1.0 percent by weight of said layer of a poly(dimethylsiloxane) having units represented by the formula:
Claim 6
Dependent Claim
60 words
A photothermographic element as in claim 3 comprising a support having thereon a layer comprising a. an oxidation-reduction image-forming combination comprising i. silver behenate with ii. a sulfonamidophenol reducing agent, b. photosensitive silver salt, c. poly(vinyl butyral) binder, d. an N-hydroxynaphthalimide or succinimide activator-toning agent, and e. about 0.001 to about 1.0 percent by weight of said layer of poly(dimethylsiloxane).
Claim 7
Dependent Claim
52 words
A photothermographic composition comprising a. photosensitive silver salt, b. a polymeric, hydrophobic binder, c. an oxidation-reduction image-forming combination comprising i. a silver salt oxidizing agent, with ii. a reducing agent and d. about 0.001 to about 1.0 percent by weight of said composition of a poly(dimethylsiloxane) having units represented by the formula:
Claim 8
Dependent Claim
52 words
A photothermographic composition comprising a. photosensitive silver salt, b. a polymeric, hydrophobic binder, c. an oxidation-reduction image-forming combination comprising i. a silver salt oxidizing agent, with ii. a reducing agent and d. about 0.001 to about 1.0 percent by weight of said composition of a poly(dimethylsiloxane) having units represented by the formula:
Claim 9
Dependent Claim
54 words
A photothermographic composition as in claim 5 comprising a. photosensitive silver salt, b. a poly(vinyl butyral) binder, c. an oxidation-reduction image-forming combination comprising i. silver behenate with ii. a sulfonamidophenol reducing agent, d. an N-hydroxynaphthalimide or succinimide activator-toning agent, and e. about 0.001 to about 1.0 percent by weight of said composition of poly(dimethylsiloxane).
Claim 10
Independent Claim
51 words
A METHOD OF DEVELOPING A LATENT IMAGE IN A PHOTOTHERMOGRAPHIC ELEMENT COMPRISING A SUPPORT HAVING THEREON A PHOTOTHERMOGRAPHIC LAYER COMPRISING A. PHOTOSENSTIVE SILVER SALT, B. A POLYMERIC, HYDROPHOBIC BINDER AND C. ABOUT 0.001 TO ABOUT 1.0 PERCENT BY WEIGHT OF SAID LAYER OF A POLY(DIMETHYLSILOXANE) HAVING UNITS REPRESENTED BY THE FORMULA:
Claim 11
Independent Claim
51 words
A METHOD OF DEVELOPING A LATENT IMAGE IN A PHOTOTHERMOGRAPHIC ELEMENT COMPRISING A SUPPORT HAVING THEREON A PHOTOTHERMOGRAPHIC LAYER COMPRISING A. PHOTOSENSTIVE SILVER SALT, B. A POLYMERIC, HYDROPHOBIC BINDER AND C. ABOUT 0.001 TO ABOUT 1.0 PERCENT BY WEIGHT OF SAID LAYER OF A POLY(DIMETHYLSILOXANE) HAVING UNITS REPRESENTED BY THE FORMULA:
Claim 12
Dependent Claim
86 words
A meThod as in claim 7 of developing a latent image in a photothermographic element comprising a support having thereon a layer comprising a. an oxidation-reduction image-forming combination comprising i. silver behenate with ii. a sulfonamidophenol reducing agent, b. photosensitive silver salt, c. poly(vinyl butyral) binder, d. an N-hydroxynaphthalimide or succinimide activator-toning agent, and e. about 0.001 to about 1.0 percent by weight of said layer of poly(dimethylsiloxane), comprising heating said element within the range of about 80*C. to about 250*C. until said image is developed.
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) | 1978-05-26 | 1978-11-25 | 1979-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-26 | 1982-11-25 | 1983-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-26 | 1986-11-25 | 1987-05-27 | $7700.00 | Window Closed / Lapsed |