US3840369A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Presensitized printing plates
Assignee: Sun Chemical Corp
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Filing: 1971-11-10
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Granted: 1974-10-08
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Expires: 1991-11-10
Abstract
Abstract Presensitized printing plates are prepared by a process which comprises the steps of (1) coating a support with a radiationcurable composition, (2) placing a negative of the image to be printed on the coated support, (3) exposing the thus-formed system to radiation to effect polymerization of the exposed portion of the coating on the support and leaving the unexposed portion wet and uncured, (4) removing the negative, and (5) removing the uncured areas to produce an oleophilic image area and a hydrophilic non-image background. The radiation-curable composition comprises at least one isocyanate-modified polyethylenically unsaturated ester and at least one photoinitiator with optionally at least one polyethylenically unsaturated ester having free hydroxyl groups.
Inventors
- 👤 D Carlick
- 👤 F Marra
- 👤 G Sprenger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:39
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/027; C; C08; C08F; C08F20/00; C08F20/02; C08F20/10; C08F20/20; C09; C09D; C09D11/00; C09D11/02; C09D11/10; C09D11/101; Y; Y10; Y10S; Y10S430/00; Y10S430/1053; Y10S430/1055; Y10S430/114; Y10S430/126
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
76 words
A PRESENSITIZED PRINTING PLATE COMPRISING A SUPPORT AND A PHOTOPOLYMERIZABLE COMPOSITION THEREON CONSISTING OF (A) ABOUT 15-99 PARTS OF AT LEAST ONE PRODUCT OF THE REACTION OF (1) A POLYFUNCTIONAL POLYETHYLENICALLY UNSATURATED MONOMERIC ESTER HAVING FREE HYDROXYL GROUPS AND FORMED BY THE REACTION OF AN ETHYLENICALLY UNSATURATED ACID AND A POLYHYDRIC ALCOHOL WITH (2) AN ORGANIC ISOCYANATE, THE ISOCYANATE-MODIFIED ESTER PRODUCT A HAVING FREE HYDROXYL GROUPS, AND (B) ABOUT 1-85 PARTS OF AT LEAST ONE PHOTOINITIATOR.
Claim 2
Dependent Claim
76 words
A PRESENSITIZED PRINTING PLATE COMPRISING A SUPPORT AND A PHOTOPOLYMERIZABLE COMPOSITION THEREON CONSISTING OF (A) ABOUT 15-99 PARTS OF AT LEAST ONE PRODUCT OF THE REACTION OF (1) A POLYFUNCTIONAL POLYETHYLENICALLY UNSATURATED MONOMERIC ESTER HAVING FREE HYDROXYL GROUPS AND FORMED BY THE REACTION OF AN ETHYLENICALLY UNSATURATED ACID AND A POLYHYDRIC ALCOHOL WITH (2) AN ORGANIC ISOCYANATE, THE ISOCYANATE-MODIFIED ESTER PRODUCT A HAVING FREE HYDROXYL GROUPS, AND (B) ABOUT 1-85 PARTS OF AT LEAST ONE PHOTOINITIATOR.
Claim 3
Dependent Claim
23 words
The printing plate of claim 1 wherein the ester (1) is a di-or polyacrylate, a di- or polymethacrylate, or a di- or polyitaconate.
Claim 4
Dependent Claim
18 words
The printing plate of claim 1 wherein the ratio of ester a to photoinitiator b is about 30-70:30-70.
Claim 5
Dependent Claim
27 words
The printing plate of claim 1 wherein the photoinitiator b is an acyloin; an acyloin derivative; a halogenated aromatic, alicyclic, or aliphatic hydrocarbon; or a mixture thereof.
Claim 6
Dependent Claim
44 words
The printing plate of claim 4 wherein at least one of the halogen atoms is bonded directly to the nucleus in the aromatic and alicyclic hydrocarbons and to the carbon chain in the aliphatic hydrocarbon and the halogen is chlorine, bromine, iodine, or fluorine.
Claim 7
Dependent Claim
16 words
The printing plate of claim 1 wherein the polyethylenically unsaturated ester a is a pentaerythritol acrylate.
Claim 8
Dependent Claim
19 words
The printing plate of claim 6 wherein the pentaerythritol acrylate is a mixture of the triacrylate and the tetraacrylate.
Claim 9
Dependent Claim
12 words
The printing plate of claim 1 wherein the isocyanate is phenyl isocyanate.
Claim 10
Dependent Claim
12 words
The printing plate of claim 1 wherein the isocyanate is tolylene diisocyanate.
Claim 11
Dependent Claim
11 words
The printing plate of claim 1 wherein the support is aluminum.
Claim 12
Dependent Claim
12 words
The printing plate of claim 1 wherein the support is polyethylene terephthalate.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-07 | 1978-04-08 | 1978-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-07 | 1982-04-08 | 1982-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-07 | 1986-04-08 | 1986-10-08 | $7700.00 | Window Closed / Lapsed |