US4600678A
Expired / Lapsed
US
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Imaging systems employing photosensitive microcapsules containing 4-(4'-aminophenyl)-pyridine compounds
Assignee: Mead Corp
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Filing: 1984-08-03
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Granted: 1986-07-15
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Expires: 2004-08-03
Abstract
Abstract Imaging systems employing photosensitive microcapsules having improved film speed are disclosed wherein the microcapsules contain a 4-(4'-aminophenyl)-pyridine compound in the internal phase as a color former.
Inventors
- 👤 Paul C. Adair
- 👤 Amy L. Burkholder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:29
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/04; G03F7/002; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2984; Y10T428/2985; Y10T428/2989
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
70 words
An imaging sheet comprising a support having on a surface thereof a layer containing photosensitive microcapsules, said microcapsules including in the internal phase thereof a free radical addition polymerizable material, a photoinitiator, and a color former, wherein said photoinitiator is capable of generating free radicals upon exposure to actinic radiation via hydrogen abstraction and said color former is a 4-(4'-aminophenyl)-pyridine compound which enhances the film speed of said imaging sheet.
Claim 2
Dependent Claim
70 words
An imaging sheet comprising a support having on a surface thereof a layer containing photosensitive microcapsules, said microcapsules including in the internal phase thereof a free radical addition polymerizable material, a photoinitiator, and a color former, wherein said photoinitiator is capable of generating free radicals upon exposure to actinic radiation via hydrogen abstraction and said color former is a 4-(4'-aminophenyl)-pyridine compound which enhances the film speed of said imaging sheet.
Claim 3
Dependent Claim
14 words
The imaging sheet of claim 1 wherein said microcapsule has a discrete capsule wall.
Claim 4
Dependent Claim
18 words
The imaging sheet of claim 2 wherein said free radical addition polymerizable material is an ethylenically unsaturated compound.
Claim 5
Dependent Claim
13 words
The imaging sheet of claim 3 wherein said photoinitiator is an aryl ketone.
Claim 6
Dependent Claim
106 words
The imaging sheet of claim 4 wherein said 4-(4'-aminophenyl)-pyridine compound is represented by the formula (I): ##STR2## in which R 1 and R 2 are the same or different and selected from the group consisting of hydrogen, methyl, ethyl, propyl, butyl, phenyl, p-methoxyphenyl, p-ethoxyphenyl, γ-methoxypropyl and p-chlorophenyl, R 3 is selected from the group consisting of hydrogen, methyl, ethyl, propyl, and butyl; R 4 is selected from the group consisting of methyl, ethyl, propyl, butyl, β-chloroethyl, βcyanoethyl, phenyl, benzyl, p-methoxyphenyl and p-ethoxyphenyl, and R 5 and R 6 are the same or different and selected from the group consisting of hydrogen, carbomethoxy, carboethoxy, carbopropoxy and carbobutoxy.
Claim 7
Dependent Claim
34 words
The imaging sheet of claim 5 wherein: R 1 and R 2 are hydrogen or phenyl; R 3 and R 4 are methyl, propyl or butyl; and R 5 and R 6 are hydrogen.
Claim 8
Dependent Claim
12 words
The imaging sheet of claim 6 wherein said compound is 2,6-diphenyl-4-(4'-dimethylaminophenyl) pyridine.
Claim 9
Dependent Claim
18 words
The imaging sheet of claim 5 wherein said aryl ketone has λ max greater than about 380 nm.
References Cited (Backward Citations)
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| 3.5 Years (Year 4) | 1989-07-14 | 1990-01-13 | 1990-07-15 | $2000.00 | Window Closed / Lapsed |
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