US4358529A
Expired / Lapsed
US
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Photosensitive reproduction elements for forming negative tonable images
Assignee: EIDP Inc
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Filing: 1981-06-17
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Granted: 1982-11-09
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Expires: 2001-06-17
Abstract
Abstract A nonsilver photosensitive reproduction element which comprises a support bearing a layer of a photosensitive composition which comprises (1) at least one thermoplastic binder, (2) a photosensitive system consisting essentially of (a) a hexaarylbiimidazole compound and (b) a dihydropyridine compound; and optionally (3) a plasticizer, and (4) a thioamide, thiolactam or thiocarbanilic acid ester of the formula: ##STR1## wherein R 1 and R 2 are as defined. The photosensitive element is useful in preparing negative tonable images.
Inventors
- 👤 Werner Abele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:15
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/72; G03C1/73; Y; Y10; Y10S; Y10S430/00; Y10S430/1053; Y10S430/1055; Y10S430/114; Y10S430/12; Y10S430/121; Y10S430/122
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
158 words
Photosensitive nonsilver reproduction element for the preparation of negative tonable images comprising a support bearing a layer of a photosensitive composition which comprises (1) at least one thermoplastic binder, (2) a photosensitive system consisting essentially of (a) at least one hexaarylbisimidazole compound; (b) a dihydropyridine compound; and (c) a thioamide, thiolactam or thiocarbanilic acid ester of the formula: ##STR6## wherein R 1 and R 2 can be the same or different and can be H, alkyl of 1 to 4 carbon atoms and aryl of 6 to 10 carbon atoms; R 1 is aryl of 6 to 10 carbon atoms and R 2 is either oxyalkyl wherein alkyl is of 1 to 8 carbon atoms or thioaryl wherein aryl is phenyl, tolyl, naphthyl; and R 1 and R 2 when taken together can be members of a 5 to 7 membered heterocyclic ring which may contain oxygen, sulfur and nitrogen as additional heteroatoms; and optionally (3) a plasticizer.
Claim 2
Dependent Claim
158 words
Photosensitive nonsilver reproduction element for the preparation of negative tonable images comprising a support bearing a layer of a photosensitive composition which comprises (1) at least one thermoplastic binder, (2) a photosensitive system consisting essentially of (a) at least one hexaarylbisimidazole compound; (b) a dihydropyridine compound; and (c) a thioamide, thiolactam or thiocarbanilic acid ester of the formula: ##STR6## wherein R 1 and R 2 can be the same or different and can be H, alkyl of 1 to 4 carbon atoms and aryl of 6 to 10 carbon atoms; R 1 is aryl of 6 to 10 carbon atoms and R 2 is either oxyalkyl wherein alkyl is of 1 to 8 carbon atoms or thioaryl wherein aryl is phenyl, tolyl, naphthyl; and R 1 and R 2 when taken together can be members of a 5 to 7 membered heterocyclic ring which may contain oxygen, sulfur and nitrogen as additional heteroatoms; and optionally (3) a plasticizer.
Claim 3
Dependent Claim
25 words
An element according to claim 1 characterized in that there is present a thioamide compound taken from thiopropionic acid anilide, thiobenzoic acid benzylamide and thioaceto-p-ethoxyanilide.
Claim 4
Dependent Claim
21 words
An element according to claim 1 characterized in that there is present a thiolactam compound taken from 2-mercaptothiazoline, 2-mercaptopyridine and ω-thiocaprolactam.
Claim 5
Dependent Claim
26 words
An element according to claim 1 characterized in that there is present a thiocarbanilic acid ester compound taken from thiocarbanilic acid-O-ethylester, thiocarbanilic acid-O-isopropylester and dithiocarbanilic acid-S-p-tolylester.
Claim 6
Dependent Claim
30 words
An element according to claim 1, claim 2, claim 3 or claim 4, characterized in that the photosensitive layer contains two or more thioamide, thiolactam and thiocarbanilic acid ester compounds.
Claim 7
Dependent Claim
39 words
An element according to claim 1 characterized in that the thioamide, thiolactam, thiocarbanilic acid ester or mixture is present in an amount of 5 to 40% by weight based on the total weight of solids in the photosensitive layer.
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) | 1985-11-08 | 1986-05-10 | 1986-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-08 | 1990-05-10 | 1990-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-08 | 1994-05-10 | 1994-11-09 | $7700.00 | Window Closed / Lapsed |