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US4350753A
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Positive acting composition yielding pre-development high visibility image after radiation exposure comprising radiation sensitive diazo oxide and haloalkyl-s-triazine with novolak and dyestuff
Assignee: Kodak Graphics Holding Inc
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Filing: 1981-06-15
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Granted: 1982-09-21
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Expires: 2001-06-15
Abstract
Abstract A colored, positive-acting, radiation-sensitive composition whose color is extinguished or greatly decreased in intensity upon irradiation comprising at least one acid-free resin, at least one component which upon irradiation yields acidic and/or free radical products, at least one acid and/or free radical sensitive dyestuff and at least one positive-acting component; positive-acting elements comprising suitable support materials at least one surface of which has been coated with the above composition and lithographic printing plates comprising the above elements, wherein the support materials are lithographically suitable support materials, whch have been imagewise exposed to radiation whereby there is a high contrast, before development, between the colored image areas and less intensely colored or colorless non-image areas, the image areas of said plates being additionally highly stable against aqueous alkaline developers after development to remove the exposed non-image areas of the composition and more highly colored than the non-image areas of the revealed substrate surface.
Inventors
- 👤 James Shelnut
- 👤 Eugene Golda
- 👤 Alan Wilkes
- 👤 Ken-ichi Shimazu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:46
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/09; G03F7/105
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
87 words
A colored, positive-acting composition whose color disappears or decreases upon irradiation comprising an admixture of, I. at least one acid-free, aqueous alkali-soluble novolak resin as the major resin in the composition; II. at least one haloalkyl-s-triazine radiation-sensitive component which upon irradiation yields acidic products; III. at least one acid-sensitive dyestuff which upon contact with the product of irradiation of component II is rendered colorless or much less intensely colored than before such contact; and IV. at least one positive-acting diazo oxide which upon irradiation yields acidic products.
Claim 2
Dependent Claim
87 words
A colored, positive-acting composition whose color disappears or decreases upon irradiation comprising an admixture of, I. at least one acid-free, aqueous alkali-soluble novolak resin as the major resin in the composition; II. at least one haloalkyl-s-triazine radiation-sensitive component which upon irradiation yields acidic products; III. at least one acid-sensitive dyestuff which upon contact with the product of irradiation of component II is rendered colorless or much less intensely colored than before such contact; and IV. at least one positive-acting diazo oxide which upon irradiation yields acidic products.
Claim 3
Dependent Claim
24 words
The composition according to claim 1 further comprising at least one component selected from the group consisting of other acid-free resins, colorants and photosensitizers.
Claim 4
Dependent Claim
15 words
The composition according to claim 1 wherein said acid-free novolak resin is a phenol-formaldehyde condensate.
Claim 5
Dependent Claim
15 words
The composition according to claim 1 wherein said acid-free novolak resin is a cresol-formaldehyde condensate.
Claim 6
Dependent Claim
17 words
The composition according to claim 1 wherein said acid-free novolak resin is a cashew nut oil-formaldehyde condensate.
Claim 7
Dependent Claim
30 words
The composition according to claim 1 or 2 wherein said component II comprises at least one compound selected from the group comprising mono-, di- or tri-(mono- or poly- halo-substituted alkyl)-s-triazines.
Claim 8
Dependent Claim
24 words
The composition according to claim 6 wherein said triazine is a 2-substituted-4,6-bis(trichloromethyl)-s-triazine wherein the 2-substituent is selected from the group comprising p-methoxyphenyl and 4-methoxynaphth-1-yl.
Claim 9
Dependent Claim
11 words
The composition according to claim 7 wherein said 2-substituent is p-methoxyphenyl.
Claim 10
Dependent Claim
11 words
The composition according to claim 7 wherein said 2-substituent is 4-methoxynaphth-1-yl.
Claim 11
Dependent Claim
24 words
The composition according to claim 1 or 2 wherein said component III is selected from the group of azo, azine, anthraquinone and triphenylmethyl dyes.
Claim 12
Dependent Claim
37 words
The composition according to claim 1 wherein said diazo oxide is selected from the group comprising aromatic or heterocyclic esters or amides of naphthoquinone-diazide-sulfonic or carboxylic acids wherein the hydroxy and amine precursors are monomeric or polymeric.
Claim 13
Dependent Claim
26 words
The composition according to claim 11 wherein said diazo oxide is the ester of 1,2-naphthoquinone-2-diazide-5-sulfonic acid with the product of the condensation of pyrogallol with acetone.
Claim 14
Dependent Claim
24 words
A positive-acting, radiation-sensitive element comprising a suitable support having coated upon at least one surface thereof a composition according to claim 1 or 2.
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) | 1985-09-20 | 1986-03-22 | 1986-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-09-20 | 1990-03-22 | 1990-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-09-20 | 1994-03-22 | 1994-09-21 | $7700.00 | Window Closed / Lapsed |