US4148659A
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Photographic material containing an organo-tellurium compound a 1,4-dihydropyridine photo oxidizing agent and the use thereof in heat development
Assignee: Agfa Gevaert NV
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Filing: 1978-02-28
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Granted: 1979-04-10
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Expires: 1998-02-28
Abstract
Abstract A photosensitive recording material containing in admixture in a binder medium: (1) an imaging substance which is a tellurium tetrahalide or an organo-tellurium compound having a halogen atom directly linked to a tellurium atom and at least one organic substituent comprising a carbonyl group, (2) a photo-oxidizing agent which is a photosensitive 4-(2'-nitrophenyl)-1,4-dihydropyridine, and (3) a heat-activatable organic reducing agent or reducing agent precursor adapted to reduce the tellurium compound upon heating but leaving that compound substantially unaffected at and below 60° C.
Inventors
- 👤 Julius L. Vuyts
- 👤 Frans C. Heugebaert
- 👤 Wilhelmus Janssens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:38
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/16; C07D295/20; C07D295/215; C07C; C07C259/00; C07C259/12; C07D211/00; C07D211/04; C07D211/80; C07D211/84; C07D211/90; C07D231/00; C07D231/02; C07D231/10; C07D231/14; C07D231/18; C07D231/20; C07D231/22; C07D231/24; C07D295/22; C07D295/26; G; G03; G03C; G03C1/00; G03C1/72; G03C1/73; G03C1/734
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
85 words
A photosensitive recording material containing in admixture in a binder medium: (1) an imaging substance which is a tellurium tetrahalide or an organo-tellurium compound having a halogen atom directly linked to a tellurium atom and at least one organic substituent comprising a carbonyl group, (2) a photo-oxidizing agent which is a photosensitive 4-(2'-nitrophenyl)-1,4-dihydropyridine, and (3) a heat-activatable organic reducing agent or reducing agent precursor that is adapted to reduce said tellurium compound by heating but leaves that compound substantially unaffected at and below 60° C.
Claim 2
Dependent Claim
85 words
A photosensitive recording material containing in admixture in a binder medium: (1) an imaging substance which is a tellurium tetrahalide or an organo-tellurium compound having a halogen atom directly linked to a tellurium atom and at least one organic substituent comprising a carbonyl group, (2) a photo-oxidizing agent which is a photosensitive 4-(2'-nitrophenyl)-1,4-dihydropyridine, and (3) a heat-activatable organic reducing agent or reducing agent precursor that is adapted to reduce said tellurium compound by heating but leaves that compound substantially unaffected at and below 60° C.
Claim 3
Dependent Claim
26 words
A material according to claim 1, wherein said reducing agent or reducing agent precursor passes the assessement test herein defined on page 3 of the specification.
Claim 4
Dependent Claim
60 words
A material according to claim 1, wherein the tellurium compound is tellurium tetrachloride or an organo tellurium compound corresponding to the following general formula: R.sub.x TeCl.sub.y wherein: R represents the organic group, which is linked by a carbon atom to the tellurium atom and contains at least one carbonyl group, x is 1, 2, or 3, and x+ y= 4.
Claim 5
Dependent Claim
27 words
A material according to claim 3, wherein the organo-tellurium compound corresponds to the following general formula: (Ar-- CO-- CH.sub.2).sub.2 TeCl.sub.2 wherein Ar stands for an aromatic group.
Claim 6
Dependent Claim
13 words
A material according to claim 4, wherein the organo-tellurium compound is bis(phenacyl)-tellurium dichloride.
Claim 7
Dependent Claim
121 words
A material according to claim 1, wherein the photo-oxidizing agent corresponds to the following general formula: ##STR16## in which: R 7 and R 8 represent hydrogen or an alkyl group and are the same or different, and R 9 and R 10 represent cyano or an acyl group or a COOR 11 group, in which R 11 represents an alkyl, alkenyl, alkynyl or cycloalkyl group or an alkyl chain interrupted by one or more hetero atoms or by imino groups and are the same or different, or R 7 and R 9 and/or R 8 and R 10 represent together the ring members required for completing a carbocyclic or heterocyclic ring which may contain a carbonyl group and may carry substituents.
Claim 8
Dependent Claim
48 words
A material according to claim 6, wherein each of R 7 and R 8 represents methyl, and each of R 9 and R 10 represents a --COOR 11 group, in which R 11 is methyl, butyl, --CH 2 --C.tbd. CH or --(CH) 2 --O--C 2 H 5 .
Claim 9
Dependent Claim
39 words
A material according to claim 1, -one conductor, wherein the heat-activatable reducing agent precursor is a pyrazolidin-3-onereductor, in which the active hydrogen atom in 2-position is temporarily blocked by reaction with an organic isocyanate or with an acid halide.
Claim 10
Dependent Claim
32 words
A material according to claim 1, wherein the heat-activatable reducing agent is a sulphonylhydrazide compound corresponding to the following general formula: R-- SO.sub.2 -- NH-- NH.sub.2 wherein R is an organic group.
Claim 11
Dependent Claim
143 words
A material according to claim 1, wherein the heat-activatable reducing agent is a compound corresponding to one of the following general formulae (I), (II) or (III): ##STR17## wherein: R 1 represents (1) an aliphatic group, a cycloaliphatic group or an aryl group, (2) a --OR 4 group wherein R 4 is an alkyl or aryl group, or (3) a ##STR18## wherein R 5 and R 6 represent hydrogen, an alkyl or an aryl group and are the same or different, or R 5 and R 6 together represent the atoms necessary to close a 5- or 6-membered heterocyclic ring, X represents O or NH, R 2 represents hydrogen, an alkyl or an aryl group, and R 3 represents an alkyl or an aryl group, or R 2 and R 3 represent together the necessary atoms to close a 5- or 6-membered heterocyclic ring.
Claim 12
Dependent Claim
17 words
A material according to claim 1, wherein the binder medium is composed of a polymeric organic substance.
Claim 13
Dependent Claim
28 words
A material according to claim 1, wherein the photo-oxidizing agent is present in at least equimolar amounts with respect to the heat-activatable reducing agent or reducing agent precursor.
Claim 14
Dependent Claim
121 words
A recording process, wherein a photosensitive recording material containing in admixture in a binder medium: (1) an imaging substance which is a tellurium tetrahalide or an organo-tellurium compound wherein halogen is directly linked to a tellurium atom and at least one organic substituent comprises a carbonyl group, (2) a photo-oxidizing agent which is a photosensitive 4-(2'-nitrophenyl)-1,4-dihydropyridine, and (3) a heat-activatable organic reducing agent or reducing agent precursor that can be caused to reduce said tellurium compound by heating but leaves that compound substantially unaffected at and below 60° C., is information-wise exposed to actinic radiation to which the photo-oxidizing agent is sensitive and the exposed material is overall heated above 60° C. to develop a tellurium image in the non-photo-exposed areas.
Claim 15
Dependent Claim
121 words
A recording process, wherein a photosensitive recording material containing in admixture in a binder medium: (1) an imaging substance which is a tellurium tetrahalide or an organo-tellurium compound wherein halogen is directly linked to a tellurium atom and at least one organic substituent comprises a carbonyl group, (2) a photo-oxidizing agent which is a photosensitive 4-(2'-nitrophenyl)-1,4-dihydropyridine, and (3) a heat-activatable organic reducing agent or reducing agent precursor that can be caused to reduce said tellurium compound by heating but leaves that compound substantially unaffected at and below 60° C., is information-wise exposed to actinic radiation to which the photo-oxidizing agent is sensitive and the exposed material is overall heated above 60° C. to develop a tellurium image in the non-photo-exposed areas.
Claim 16
Dependent Claim
20 words
A recording process according to claim 13, wherein the heating proceeds in the temperature range of 80° to 200° C.
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) | 1982-04-09 | 1982-10-09 | 1983-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-09 | 1986-10-09 | 1987-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-09 | 1990-10-09 | 1991-04-10 | $7700.00 | Window Closed / Lapsed |