US4075019A
Expired / Lapsed
US
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High gain cobalt(III)complex composition and element
Assignee: Eastman Kodak Co
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Filing: 1975-10-30
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Granted: 1978-02-21
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Expires: 1995-10-30
Abstract
Abstract An image-forming element is disclosed comprised of a support and a coating thereon containing a cobalt(III)complex and a compound containing a conjugated π bonding system capable of forming at least a bidentate chelate with cobalt(III). The coating is predominantly free of anions which will form conjugate acids by deprotonation of a cobalt(II)complex containing the chelating compound. In one preferred form the image-forming element is radiation-sensitive. In this form the image-forming element can contain a photoactivator capable of initiating reduction of the cobalt(III)complex. An imaging process is disclosed in which the coating is exposed to actinic radiation to produce an image. Images can be recorded directly within the image-forming coating or in a separate image-recording element or layer by use of the residual cobalt(III)complex or by use of one or more of the reaction products produced by exposure. By using the ammonia liberated from amine ligand containing cobalt(III)complexes on exposure in combination with imagewise and uniform exposures, positive or negative images can be formed in diazo image-recording layers or elements associated with the image-forming coating.
Inventors
- 👤 Thap DoMinh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:17
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/67; B; B41; B41M; B41M5/00; B41M5/26; B41M5/30; B41M5/32; Y; Y10; Y10S; Y10S430/00; Y10S430/137
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
125 words
An image-forming element exhibiting upon exposure on internal gain and comprising a support and, as a coating thereon, a radiation-sensitive layer comprised of, in admixture, a cobalt(III)complex which is a hexa-ammine cobalt(III), penta-ammine cobalt(III), bis(ethylenediamine) cobalt(III), tris(ethylenediamine cobalt(III), bis(propylene) cobalt(III), tris(propylene) cobalt(III), bis(dimethylglyoxime) cobalt(III), cobalt(III) acetylacetonate or bis(2,2'-bipyridyl) cobalt(III) complex and a compound containing a conjugated π-bonding system capable of forming a tridentate chelate with cobalt(III), said compound being a 1-(2-pyridyl, 2-quinolinly, 2-thiazolyl, 2-benzothiazolyl, 2-oxazolyl or 2-benzoxazolyl) formazan dye; a 1-(2-pyridyl, 2-quinolinyl, 2-thiazolyl, 2-benzothiazolyl, 2-oxazolyl or 2-benzoxazolyl)-azo-2-(phenol or naphthol); 2-pyridinecarboxylaldehyde-(2-pyridyl, 2-quinolinyl, 2-thiazolyl, 2-benzothiazolyl, 2-oxazolyl or 2-benzoxazolyl) hydrazone; or 1-(2-pyridyl, 2-quinolinyl, 2-thiazolyl, 2-benzothiazolyl, 2-oxazolyl or 2-benzoxazolyl)-dithiooxamide; less than 50 mole percent of any acid anions of said coating being those having pKa values greater than 3.5.
Claim 2
Dependent Claim
125 words
An image-forming element exhibiting upon exposure on internal gain and comprising a support and, as a coating thereon, a radiation-sensitive layer comprised of, in admixture, a cobalt(III)complex which is a hexa-ammine cobalt(III), penta-ammine cobalt(III), bis(ethylenediamine) cobalt(III), tris(ethylenediamine cobalt(III), bis(propylene) cobalt(III), tris(propylene) cobalt(III), bis(dimethylglyoxime) cobalt(III), cobalt(III) acetylacetonate or bis(2,2'-bipyridyl) cobalt(III) complex and a compound containing a conjugated π-bonding system capable of forming a tridentate chelate with cobalt(III), said compound being a 1-(2-pyridyl, 2-quinolinly, 2-thiazolyl, 2-benzothiazolyl, 2-oxazolyl or 2-benzoxazolyl) formazan dye; a 1-(2-pyridyl, 2-quinolinyl, 2-thiazolyl, 2-benzothiazolyl, 2-oxazolyl or 2-benzoxazolyl)-azo-2-(phenol or naphthol); 2-pyridinecarboxylaldehyde-(2-pyridyl, 2-quinolinyl, 2-thiazolyl, 2-benzothiazolyl, 2-oxazolyl or 2-benzoxazolyl) hydrazone; or 1-(2-pyridyl, 2-quinolinyl, 2-thiazolyl, 2-benzothiazolyl, 2-oxazolyl or 2-benzoxazolyl)-dithiooxamide; less than 50 mole percent of any acid anions of said coating being those having pKa values greater than 3.5.
Claim 3
Dependent Claim
28 words
An element as defined in claim 1, wherein less than 50 mole percent of the acid anions of said coating are those having pKa values greater than 3.0.
Claim 4
Dependent Claim
18 words
An element as defined in claim 1, wherein said complex is hexa-ammine cobalt(III)trifluoroacetate and said compound is 1-(2-pyridylazo)-2-naphthol.
Claim 5
Dependent Claim
138 words
A radiation-sensitive element exhibiting upon exposure an internal gain, comprising a support and, as a coating thereon, a radiation-sensitive layer comprising, in admixture, a compound containing a conjugated π-bonding system capable of forming a tridentate chelate with cobalt(III), said compound being defined by one of the formulas: Z.sup.2 --N═N --Z.sup.3, z.sup.4 --ch═n--nh--z.sup.5 or Z.sup.6 --CH═N--Z.sup.7 wherein Z 2 , Z 3 , Z 4 , Z 5 , Z 6 , and Z 7 are independently chosen from among 2-hydroxy, carboxy or amino substituted naphthyl or phenyl; 2-pyridyl; 2-quinolinyl; 2-thiazolyl; 2-benzothiazolyl; 2-oxazolyl; and 2-benzoxazolyl groups, and are each capable of forming chelate ligands, and an inert cobalt(III)complex capable of being reduced by a cobalt(III)complex containing said chelating compound, less than 50 mole percent of any acid anions of said layer being those having pKa values greater than 3.5.
Claim 6
Dependent Claim
138 words
A radiation-sensitive element exhibiting upon exposure an internal gain, comprising a support and, as a coating thereon, a radiation-sensitive layer comprising, in admixture, a compound containing a conjugated π-bonding system capable of forming a tridentate chelate with cobalt(III), said compound being defined by one of the formulas: Z.sup.2 --N═N --Z.sup.3, z.sup.4 --ch═n--nh--z.sup.5 or Z.sup.6 --CH═N--Z.sup.7 wherein Z 2 , Z 3 , Z 4 , Z 5 , Z 6 , and Z 7 are independently chosen from among 2-hydroxy, carboxy or amino substituted naphthyl or phenyl; 2-pyridyl; 2-quinolinyl; 2-thiazolyl; 2-benzothiazolyl; 2-oxazolyl; and 2-benzoxazolyl groups, and are each capable of forming chelate ligands, and an inert cobalt(III)complex capable of being reduced by a cobalt(III)complex containing said chelating compound, less than 50 mole percent of any acid anions of said layer being those having pKa values greater than 3.5.
Claim 7
Dependent Claim
28 words
An element as defined in claim 4, wherein less than 50 mole percent of the acid anions of said coating are those having pKa values greater than 3.0.
Claim 8
Dependent Claim
18 words
An element as defined in claim 4, wherein said complex is hexa-ammine cobalt(III)trifluoroacetate and said compound is 1-(2-pyridylazo)-2-naphthol.
Claim 9
Dependent Claim
127 words
A radiation-sensitive composition exhibiting upon exposure an internal gain and comprising, in admixture, a compound containing a conjugated π-bonding system capable of forming a tridentate chelate with cobalt(III), said compound being defined by one of the formulas: Z.sup.2 --N═--Z.sup.3, z.sup.4 --ch═n--nh--z.sup.5 or Z.sup.6 --CH═N--Z.sup.7 wherein Z 2 , Z 3 , Z 4 , Z 5 , Z 6 , and Z 7 are independently chosen from among 2-hydroxy, carboxy or amino substituted naphthyl or phenyl; 2-pyridyl; 2-quinolinyl; 2-thiazolyl; 2-benzothiazolyl; 2-oxazolyl; and 2-benzoxazolyl groups, and are each capable of forming chelate ligands, and an inert cobalt(III)complex capable of being reduced by a cobalt(II)complex containing said chelating compound, less than 50 mole percent of any acid anions of said composition being those having pKa values greater than 3.5.
Claim 10
Dependent Claim
127 words
A radiation-sensitive composition exhibiting upon exposure an internal gain and comprising, in admixture, a compound containing a conjugated π-bonding system capable of forming a tridentate chelate with cobalt(III), said compound being defined by one of the formulas: Z.sup.2 --N═--Z.sup.3, z.sup.4 --ch═n--nh--z.sup.5 or Z.sup.6 --CH═N--Z.sup.7 wherein Z 2 , Z 3 , Z 4 , Z 5 , Z 6 , and Z 7 are independently chosen from among 2-hydroxy, carboxy or amino substituted naphthyl or phenyl; 2-pyridyl; 2-quinolinyl; 2-thiazolyl; 2-benzothiazolyl; 2-oxazolyl; and 2-benzoxazolyl groups, and are each capable of forming chelate ligands, and an inert cobalt(III)complex capable of being reduced by a cobalt(II)complex containing said chelating compound, less than 50 mole percent of any acid anions of said composition being those having pKa values greater than 3.5.
Claim 11
Dependent Claim
27 words
A composition according to claim 7 wherein less than 50 mole percent of any acid anions of said composition are those having pKa values greater than 3.0.
Claim 12
Dependent Claim
113 words
A radiation-sensitive composition exhibiting upon exposure an internal gain and comprising, in admixture, a cobalt(III)complex which is a hexa-ammine cobalt(III), penta-ammine cobalt(III), bis(ethylenediamine) cobalt(III), tris(ethylenediamine) cobalt(III), bis(propylene cobalt(III), tris(propylene) cobalt(III), bis(dimethylglyoxime) cobalt(III), cobalt(III) acetylacetonate or bis(2,2'-bipridyl) cobalt(III) complex and a compound containing a conjugated π-bonding system capable of forming a tridentate chelate with cobalt(III), said compound being a 1-(2-pyridyl, 2-quinolinyl, 2-thiazolyl, 2-benzothiazolyl, 2-oxazolyl or 2-benzoxazolyl) formazan dye; a 1-(2-pyridyl, 2-quinolinyl, 2-thiazolyl, 2-benzothiazolyl, 2-oxazolyl or 2-benzoxazolyl)azo-2-(phenol or naphthol); 2-pyridinecarboxylaldehyde-(2-pyridyl, 2-quinolinyl, 2-thiazolyl, 2-benzothiazolyl, 2-oxazolyl or 2-benzoxazolyl) hydrazone; or 1-(2-pyridyl, 2-quinolinyl, 2-thiazolyl, 2-benzothiazolyl, 2-oxazolyl or 2-benzoxazolyl)-dithiooxamide; less than 50 mole percent of the acid anions of said composition being those having pKa values greater than 3.5.
Claim 13
Dependent Claim
113 words
A radiation-sensitive composition exhibiting upon exposure an internal gain and comprising, in admixture, a cobalt(III)complex which is a hexa-ammine cobalt(III), penta-ammine cobalt(III), bis(ethylenediamine) cobalt(III), tris(ethylenediamine) cobalt(III), bis(propylene cobalt(III), tris(propylene) cobalt(III), bis(dimethylglyoxime) cobalt(III), cobalt(III) acetylacetonate or bis(2,2'-bipridyl) cobalt(III) complex and a compound containing a conjugated π-bonding system capable of forming a tridentate chelate with cobalt(III), said compound being a 1-(2-pyridyl, 2-quinolinyl, 2-thiazolyl, 2-benzothiazolyl, 2-oxazolyl or 2-benzoxazolyl) formazan dye; a 1-(2-pyridyl, 2-quinolinyl, 2-thiazolyl, 2-benzothiazolyl, 2-oxazolyl or 2-benzoxazolyl)azo-2-(phenol or naphthol); 2-pyridinecarboxylaldehyde-(2-pyridyl, 2-quinolinyl, 2-thiazolyl, 2-benzothiazolyl, 2-oxazolyl or 2-benzoxazolyl) hydrazone; or 1-(2-pyridyl, 2-quinolinyl, 2-thiazolyl, 2-benzothiazolyl, 2-oxazolyl or 2-benzoxazolyl)-dithiooxamide; less than 50 mole percent of the acid anions of said composition being those having pKa values greater than 3.5.
References Cited (Backward Citations)
US1880449A
Cited
US2884326A
Cited
US2951758A
Cited
US3655383A
Cited
GB908299A
Cited
US3297440A
Cited
US3383212A
Cited
US3418118A
Cited
US3525622A
Cited
US3623865A
Cited
US3561969A
Cited
US3567453A
Cited
US3754914A
Cited
US3622341A
Cited
US3765883A
Cited
US3856524A
Cited
US3867144A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-02-20 | 1981-08-22 | 1982-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-20 | 1985-08-22 | 1986-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-20 | 1989-08-22 | 1990-02-21 | $7700.00 | Window Closed / Lapsed |