US3929489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lithographic plates having radiation sensitive elements developable with aqueous alcohol
Assignee: Eastman Kodak Co
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Filing: 1973-09-14
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Granted: 1975-12-30
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Expires: 1993-09-14
Abstract
Abstract A condensation copolymer is disclosed which is capable of being crosslinked by exposure to radiation and which, prior to exposure, is capable of being transported in an aqueous alcoholic alkaline developer. The condensation copolymer has first dicarboxylic acid derived repeating units containing non-aromatic ethylenic unsaturation capable of providing crosslinking sites and second aromatic dicarboxylic acid derived repeating units containing disulfonamido units containing monovalent cations as amido nitrogen atom substituents. The photographic elements formed from the condensation copolymer are particularly useful as lithographic plates.
Inventors
- 👤 Joseph A Arcesi
- 👤 Frederick J Rauner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:24
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/52; C08G63/68; C08G63/688; C08G63/6884; C08G63/6888; G; G03; G03F; G03F7/00; G03F7/004; G03F7/038; G03F7/0384; G03F7/0388; Y; Y10; Y10S; Y10S430/00; Y10S430/1053; Y10S430/1055; Y10S430/106; Y10S430/108
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
104 words
IN A LITHOGRAPHIC PRINTING PLATE COMPRISED OF A HYDROPHILIC SUPPORT MEANS HAVING AS A RADIATION SENSITIVE COATED LAYER THEREON A COMPOSITION COMPRISED OF A CONDENSATION COPOLYMER SAID COPOLYMER HAVING FIRST DICARBOXYLIC ACID DERIVED REPEATING UNITS CONTAINING NON-AROMATIC VINYL UNSATURATION CAPABLE OF PROVIDING CROSSLINKING SITES FOR THE PURPOSE OF INSOLUBILIZING SAID COPOLYMER UPON EXPOSUURE OF SAID COMPOSITION THE ACTINIC RADIATION, THE IMPROVEMENT COMPRRISING: THE INCLUSION WITHIN SAID COPOLYMER OF SECOND, AROMATIC DICARBOXYLIC ACID DERIVED REPREATING UNITS EACH CONTAINING A DISULFONAMIDO UNIT CONTAINING A MONOVALENT CATION AS AN AMIDO NITROGEN ATOM SUBSTITUENT THUS RENDERING SAID COPOLYMER IN ITS UNEXPOSED FORM SOLUBLE IN AN AQUEOUS ALKALINE DEVELOPER.
Claim 2
Dependent Claim
104 words
IN A LITHOGRAPHIC PRINTING PLATE COMPRISED OF A HYDROPHILIC SUPPORT MEANS HAVING AS A RADIATION SENSITIVE COATED LAYER THEREON A COMPOSITION COMPRISED OF A CONDENSATION COPOLYMER SAID COPOLYMER HAVING FIRST DICARBOXYLIC ACID DERIVED REPEATING UNITS CONTAINING NON-AROMATIC VINYL UNSATURATION CAPABLE OF PROVIDING CROSSLINKING SITES FOR THE PURPOSE OF INSOLUBILIZING SAID COPOLYMER UPON EXPOSUURE OF SAID COMPOSITION THE ACTINIC RADIATION, THE IMPROVEMENT COMPRRISING: THE INCLUSION WITHIN SAID COPOLYMER OF SECOND, AROMATIC DICARBOXYLIC ACID DERIVED REPREATING UNITS EACH CONTAINING A DISULFONAMIDO UNIT CONTAINING A MONOVALENT CATION AS AN AMIDO NITROGEN ATOM SUBSTITUENT THUS RENDERING SAID COPOLYMER IN ITS UNEXPOSED FORM SOLUBLE IN AN AQUEOUS ALKALINE DEVELOPER.
Claim 3
Dependent Claim
17 words
A lithographic printing plate according to claim 1 in which said support means includes an aluminum support.
Claim 4
Dependent Claim
90 words
In a lithographic printing plate comprised of hydrophilic support means having as a radiation-sensitive coated layer thereon a composition comprised of a sensitizer and a condensation copolymer soluble in an aqueous alkaline developer, said copolymer having first dicarboxylic acid derived repeating units containing non-aromatic vinyl unsaturation capable of providing crosslinking sites for the purpose of insolubilizing said copolymer to form hydrophobic printing areas upon exposure of said composition to actinic radiation, the improvement comprising: the inclusion within said copolymer of second dicarboxylic acid derived repeating units characterized by the formula
Claim 5
Dependent Claim
90 words
In a lithographic printing plate comprised of hydrophilic support means having as a radiation-sensitive coated layer thereon a composition comprised of a sensitizer and a condensation copolymer soluble in an aqueous alkaline developer, said copolymer having first dicarboxylic acid derived repeating units containing non-aromatic vinyl unsaturation capable of providing crosslinking sites for the purpose of insolubilizing said copolymer to form hydrophobic printing areas upon exposure of said composition to actinic radiation, the improvement comprising: the inclusion within said copolymer of second dicarboxylic acid derived repeating units characterized by the formula
Claim 6
Dependent Claim
38 words
In a lithographic printing plate according to claim 3 the further improvement in which said first dicarboxylic acid derived repeating units contain at least two condensation sites, at least one of which includes a group of the formula
Claim 7
Dependent Claim
27 words
In a lithographic printing plate according to claim 4 the further improvement in which said first dicarboxylic acid derived repeating units include a group of the formula
Claim 8
Dependent Claim
24 words
In a lithographic printing plate according to claim 5 the further improvement in which the vinyl carbonyl units are located para to each other.
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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) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |