US4155761A
Expired / Lapsed
US
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Electrically activated charge sensitive recording material and process
Assignee: Eastman Kodak Co
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Filing: 1978-06-26
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Granted: 1979-05-22
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Expires: 1998-06-26
Abstract
Abstract A non-silver, charge-sensitive recording composite element having an ohmic resistivity of at least about 1×10 10 ohm-cm comprising (a) a first electrically conducting layer in association with (b) a photoconductor layer, (c) a non-silver, electrically activated recording layer comprising an image-forming combination of (i) a certain tellurium (II) coordination complex with (ii) a reducing agent, and a binder and (d) a second electrical conducting layer can provide a non-silver image having a density equal to silver images. Silica, especially colloidal silica, is also very useful in the recording layer. The recording element can be room light handleable and can provide a developed image by dry development processes.
Inventors
- 👤 Mark Lelental
- 👤 Henry J. Gysling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:40
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/153; G03C; G03C1/00; G03C1/72; G03C1/73; G03C1/734; G03G5/14; Y; Y10; Y10S; Y10S430/00; Y10S430/001; Y10S430/10; Y10S430/167
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
106 words
A non-silver, charge-sensitive recording composite element having an ohmic resistivity of at least about 1×10 10 ohm-cm comprising, in sequence, a support having thereon (a) a first electrical conducting layer, (b) a photoconductor layer, (c) a non-silver, electrically activated recording layer comprising an image-forming combination of (i) a Te(II) coordination complex represented by the formula: YTeY' wherein Y and Y' are independently bidentate, sulfur containing, univalent anions represented by the formula: ##STR12## wherein X represents the atoms necessary to complete a dithiocarbamate, xanthate, thioxanthate, dithioacid, dithiophosphinate, difluorodithiophosphinate, dithiophosphate or dithiocarbimate radical, with (ii) a reducing agent, and a binder, and (d) a second electrical conducting layer.
Claim 2
Dependent Claim
106 words
A non-silver, charge-sensitive recording composite element having an ohmic resistivity of at least about 1×10 10 ohm-cm comprising, in sequence, a support having thereon (a) a first electrical conducting layer, (b) a photoconductor layer, (c) a non-silver, electrically activated recording layer comprising an image-forming combination of (i) a Te(II) coordination complex represented by the formula: YTeY' wherein Y and Y' are independently bidentate, sulfur containing, univalent anions represented by the formula: ##STR12## wherein X represents the atoms necessary to complete a dithiocarbamate, xanthate, thioxanthate, dithioacid, dithiophosphinate, difluorodithiophosphinate, dithiophosphate or dithiocarbimate radical, with (ii) a reducing agent, and a binder, and (d) a second electrical conducting layer.
Claim 3
Dependent Claim
44 words
A non-silver, charge-sensitive recording composite element as in claim 1 wherein said Te(II) coordination complex is represented by the formula: ##STR13## wherein R 1 and R 2 are individually alkyl containing 1 to 10 carbon atoms or aryl containing 6 to 12 carbon atoms.
Claim 4
Dependent Claim
67 words
A non-silver, charge-sensitive recording composite as in claim 1 wherein said Te(II) complex is selected from the group consisting of Te(S 2 COC 2 H 5 ) 2 , Te(S 2 CO-i-C 3 H 7 ) 2 , Te(S 2 COC 4 H 9 ) 2 , Te(S 2 COC 10 H 21 ) 2 and Te(S 2 CN(C 2 H 5 ) 2 ) 2 .
Claim 5
Dependent Claim
31 words
A non-silver, charge-sensitive recording composite element as in claim 1 wherein said reducing agent is selected from the group consisting of 3-pyrazolidone, phenolic, reductone and sulfonamidophenol reducing agents and combinations thereof.
Claim 6
Dependent Claim
18 words
A non-silver, charge-sensitive recording composite element as in claim 1 wherein said reducing agent is p-benzenesulfonamidophenol or 2,6-dichlorobenzenesulfonamidophenol.
Claim 7
Dependent Claim
16 words
A non-silver, charge-sensitive recording composite element as in claim 1 wherein said binder is poly(vinyl butyral).
Claim 8
Dependent Claim
21 words
A recording element as in claim 1 wherein said photoconductor layer comprises a dispersion of lead oxide in an insulating binder.
Claim 9
Dependent Claim
34 words
A recording element as in claim 1 wherein said photoconductor layer is X-ray sensitive and the conductivity of said photoconductor layer can be imagewise altered by imagewise exposing said photoconductive layer to X-ray radiation.
Claim 10
Dependent Claim
28 words
A non-silver, charge-sensitive recording composite element as in claim 1 comprising about 10 -5 to about 10 -2 moles of said Te(II) complex per square meter of support.
Claim 11
Dependent Claim
35 words
A non-silver, charge-sensitive recording composite element as in claim 1 also comprising in said recording layer a reducible metal salt selected from the group consisting of salts of lead, nickel, and copper and combinations thereof.
Claim 12
Dependent Claim
37 words
A non-silver, charge-sensitive recording composite element as in claim 1 also comprising a concentration of colloidal silica in said recording layer which produces increased density in a developed image upon imagewise exposure and heating said recording layer.
Claim 13
Dependent Claim
70 words
A non-silver, charge-sensitive recording composite element having an ohmic resistivity of at least about 1×10 10 ohm-cm comprising, in sequence, a support having thereon (a) a nickel, electrical conducting layer, (b) an organic photoconductor layer, (c) a non-silver, electrically activated recording layer comprising an image-forming combination of (i) a Te(II) xanthate complex, with (ii) a sulfonamidophenol reducing agent, and a polymeric binder, and (d) a chromium composition, electrical conducting layer.
Claim 14
Dependent Claim
70 words
A non-silver, charge-sensitive recording composite element having an ohmic resistivity of at least about 1×10 10 ohm-cm comprising, in sequence, a support having thereon (a) a nickel, electrical conducting layer, (b) an organic photoconductor layer, (c) a non-silver, electrically activated recording layer comprising an image-forming combination of (i) a Te(II) xanthate complex, with (ii) a sulfonamidophenol reducing agent, and a polymeric binder, and (d) a chromium composition, electrical conducting layer.
Claim 15
Dependent Claim
37 words
A non-silver, charge-sensitive recording composite element as in claim 12 also comprising a concentration of colloidal silica in said recording layer which produces increased density in a developed image upon imagewise exposure and heating said recording layer.
Claim 16
Dependent Claim
130 words
A non-silver, charge-sensitive recording composite element having an ohmic resistivity of at least 1×10 10 ohm-cm comprising, in sequence, a support having thereon (a) a first electrical conducting layer, (b) a first photoconductor layer, (c) a first, non-silver, electrically activated recording layer comprising a first image-forming combination of (i) a Te(II) coordination complex represented by the formula: YTeY' wherein Y and Y' are independently bidentate, sulfur containing, univalent anions represented by the formula: ##STR14## wherein X represents the atoms necessary to complete a dithiocarbamate, xanthate, thioxanthate, dithioacid, dithiophosphinate, difluorodithiophosphinate, dithiophosphate or dithiocarbimate radical, with (ii) a reducing agent, and a binder, and (d) a second electrical conducting layer, (e) a support, (f) a third electrical conducting layer, (g) a second, electrically activated recording layer, and (h) a second photoconductor layer.
Claim 17
Dependent Claim
130 words
A non-silver, charge-sensitive recording composite element having an ohmic resistivity of at least 1×10 10 ohm-cm comprising, in sequence, a support having thereon (a) a first electrical conducting layer, (b) a first photoconductor layer, (c) a first, non-silver, electrically activated recording layer comprising a first image-forming combination of (i) a Te(II) coordination complex represented by the formula: YTeY' wherein Y and Y' are independently bidentate, sulfur containing, univalent anions represented by the formula: ##STR14## wherein X represents the atoms necessary to complete a dithiocarbamate, xanthate, thioxanthate, dithioacid, dithiophosphinate, difluorodithiophosphinate, dithiophosphate or dithiocarbimate radical, with (ii) a reducing agent, and a binder, and (d) a second electrical conducting layer, (e) a support, (f) a third electrical conducting layer, (g) a second, electrically activated recording layer, and (h) a second photoconductor layer.
Claim 18
Dependent Claim
44 words
A non-silver, charge-sensitive recording composite element as in claim 14 wherein said Te(II) coordination complex is represented by the formula: ##STR15## wherein R 1 and R 2 are individually alkyl containing 1 to 10 carbon atoms or aryl containing 6 to 12 carbon atoms.
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) | 1982-05-21 | 1982-11-20 | 1983-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-21 | 1986-11-20 | 1987-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-21 | 1990-11-20 | 1991-05-22 | $7700.00 | Window Closed / Lapsed |