US3899335A
Expired / Lapsed
US
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Diazotype elements and processes with carbodiimide dehydrating agents to generator couplers
Assignee: Eastman Kodak Co
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Filing: 1974-03-20
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Granted: 1975-08-12
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Expires: 1994-03-20
Abstract
Abstract A light-sensitive, heat-developable diazotype element comprising a light-sensitive diazonium salt, a solid carbodiimide dehydrating agent, and a solid coupler precursor in the form of an aminocarboxylic acid capable of producing a diazo coupler upon dehydration; and the method of using it to produce a visible dye image wherein the element is exposed to actinic radiation and then heated to the melting point of the dehydrating agent or coupler precursor to activate the dehydrating agent, and generate the diazo coupler which in turn reacts with undecomposed (unexposed) areas of the diazonium salt to yield an imagewise dye pattern. Optionally, an alkali precursor may be utilized in the element to accelerate dye formation.
Inventors
- 👤 Wojciech Maria Przezdziecki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:05
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/52; G03C1/58; G03C1/585
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
38 words
IMAGEWISE EXPOSING TO ACTINIC RADIATION A SUPPORTED LAYER COMPRISING A. A LIGHT-SENSITIVE DIAZONIUM COMPOUND, AND B. AT LEAST ONE COMPOUND SELECTED FROM AT LEAST ONE BUT NOT BOTH OF I. A SOLID CARBODILIMIDE DHYDRATING AGENT HAVING THE FORMULA
Claim 2
Dependent Claim
38 words
IMAGEWISE EXPOSING TO ACTINIC RADIATION A SUPPORTED LAYER COMPRISING A. A LIGHT-SENSITIVE DIAZONIUM COMPOUND, AND B. AT LEAST ONE COMPOUND SELECTED FROM AT LEAST ONE BUT NOT BOTH OF I. A SOLID CARBODILIMIDE DHYDRATING AGENT HAVING THE FORMULA
Claim 3
Independent Claim
11 words
A METHOD OF FORMING AN AZO IMAGE COMPRISING THE STEP OF:
Claim 4
Independent Claim
11 words
A METHOD OF FORMING AN AZO IMAGE COMPRISING THE STEP OF:
Claim 5
Dependent Claim
63 words
HEATING SAID IMAGEWISE EXPOSED LAYER WHILE IN CONTACT WITH A LAYER COMPRISING THE OTHER OF (I) AND (II) TO A TEMPERATURE SUFFICIENT TO CAUSE SAID ACID AND SAID CARBODIIMIDE DHYDRATING AGENT TO COME INTO REACTIVE CONTACT THEREBY INITIATING FORMATION OF SAID COUPLER BY DEHYDRATION AND PRODUCTION OF SAID AZO DYE IMAGE BY REACTION OF SAID COUPLER WITH UNEXPOSED PORTIONS OF SAID DIAZONIUM COMPOUND.
Claim 6
Dependent Claim
63 words
HEATING SAID IMAGEWISE EXPOSED LAYER WHILE IN CONTACT WITH A LAYER COMPRISING THE OTHER OF (I) AND (II) TO A TEMPERATURE SUFFICIENT TO CAUSE SAID ACID AND SAID CARBODIIMIDE DHYDRATING AGENT TO COME INTO REACTIVE CONTACT THEREBY INITIATING FORMATION OF SAID COUPLER BY DEHYDRATION AND PRODUCTION OF SAID AZO DYE IMAGE BY REACTION OF SAID COUPLER WITH UNEXPOSED PORTIONS OF SAID DIAZONIUM COMPOUND.
Claim 7
Dependent Claim
19 words
A method according to claim 1 wherein said glycine is selected from the group consisting of N-dithio-carbalkoxyglycines and N-thiocarbalkoxyglycines.
Claim 8
Dependent Claim
63 words
heating said imagewise exposed layer while in contact with a layer comprising the other of (i) and (ii) to a temperature sufficient to cause said acid and said carbodiimide dehydrating agent to come into reactive contact thereby initiating formation of said coupler by dehydration and production of said azo dye image by reaction of said coupler with unexposed portions of said diazonium compound.
Claim 9
Dependent Claim
63 words
heating said imagewise exposed layer while in contact with a layer comprising the other of (i) and (ii) to a temperature sufficient to cause said acid and said carbodiimide dehydrating agent to come into reactive contact thereby initiating formation of said coupler by dehydration and production of said azo dye image by reaction of said coupler with unexposed portions of said diazonium compound.
Claim 10
Dependent Claim
24 words
A method according to claim 1 wherein said carbodiimide is selected from the group consisting of dinaphthylcarbodiimide, dicyclohexylcarbodiimide, N-phenyl-N''-cyclohexylcarbodiimide, di-p-dimethylaminophenylcarbodiimide, N-tert-butyl-N''-(triphenylmethyl)-carbodiimide and 1-ethyl-3(3-dimethylaminopropyl)-carbodiimide hydrochloride.
Claim 11
Dependent Claim
21 words
A LIGHT-SENSITIVE HEAT-DEVELOPABLE DIAZOTYPE IMAGING ELEMENT COMPRISING. A. A LAYER COMPRISED OF A NORMALLY SOLID CARBODIIMIDE DEHYDRATING AGENT HAVING THE FORMULA
Claim 12
Dependent Claim
21 words
A LIGHT-SENSITIVE HEAT-DEVELOPABLE DIAZOTYPE IMAGING ELEMENT COMPRISING. A. A LAYER COMPRISED OF A NORMALLY SOLID CARBODIIMIDE DEHYDRATING AGENT HAVING THE FORMULA
Claim 13
Dependent Claim
19 words
An element according to claim 4 wherein said glycine is selected from the group consisting of N-dithio-carbalkoxyglycines and N-thiocarbalkoxyglycines.
Claim 14
Dependent Claim
24 words
An element according to claim 4 wherein said carbodiimide is selected from the group consisting of dinaphthylcarbodiimide, dicyclohexylcarbodiimide, N-phenyl-N''-cyclohexylcarbodiimide, di-p-dimethylaminophenylcarbodiimide, N-tert-butyl-N''-(triphenylmethyl)-carbodiimide and 1-ethyl-3(3-dimethylaminopropyl)-carbodiimide hydrochloride.
Claim 15
Dependent Claim
38 words
A LIGHT-SENSITIVE HEAT-DEVELOPEABLE DIAZOTYPE COMPOSITION FOR USE WITH A COUPLER PRECURSOR CAPABLE OF FORMING A COUPLER UPON DEHYDRARION, THE COMPOSITION COMPRISING, AN ADMIXTURE OF A LIGHT-SENSITIVE DIAZONIUM COMPOUND, AND A NORMALLY SOLID CARBODIIMIDE DEHYDRATING AGENT HAVING THE FORMULA
Claim 16
Dependent Claim
38 words
A LIGHT-SENSITIVE HEAT-DEVELOPEABLE DIAZOTYPE COMPOSITION FOR USE WITH A COUPLER PRECURSOR CAPABLE OF FORMING A COUPLER UPON DEHYDRARION, THE COMPOSITION COMPRISING, AN ADMIXTURE OF A LIGHT-SENSITIVE DIAZONIUM COMPOUND, AND A NORMALLY SOLID CARBODIIMIDE DEHYDRATING AGENT HAVING THE FORMULA
Claim 17
Dependent Claim
24 words
A composition according to claim 7 wherein said carbodiimide is selected from the group consisting of dinaphthylcarbodiimide, dicyclohexylcarbodiimide, N-phenyl-N''-cyclohexylcarbodiimide, di-p-dimethylaminophenylcarbodiimide, N-tert-butyl-N''-(triphenylmethyl)-carbodiimide and 1-ethyl-3(3-dimethylaminopropyl)-carbodiimide hydrochloride.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-11 | 1979-02-10 | 1979-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-11 | 1983-02-10 | 1983-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-11 | 1987-02-10 | 1987-08-12 | $7700.00 | Window Closed / Lapsed |