US4147549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lithographic printing plate having addition polymerized areas and binder areas
Assignee: EIDP Inc
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Filing: 1977-06-22
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Granted: 1979-04-03
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Expires: 1997-06-22
Abstract
Abstract A lithographic printing plate is prepared from a layer of a photopolymerizable composition comprising an oleophilic macromolecular organic binder and a leachable hydrophilic ethylenically unsaturated compound by e posing the layer and then leaching the compound from the unexposed areas by treating with a suitable developing solvent, preferably water, producing an oleophilic surface. A similar plate may be prepared from a composition containing a hydrophilic binder and oleophilic leachable compound by imagewise exposure and solvent leaching producing an oleophilic surface in exposed areas and a hydrophilic surface in unexposed areas.
Inventors
- 👤 Robert P. Held
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:39
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/027; G03F7/032; G03F7/26; G03F7/30; G03F7/32
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
64 words
A printing plate having addition polymerized and unpolymerized image areas which comprises a support bearing over its entire surface a layer comprised of a hydrophilic or oleophilic polymeric binder and in the addition polymerized image areas a polymerized ethylenically unsaturated monomer of hydrophilic or oleophilic character opposite that of the polymeric binder, the unpolymerized image areas being substantially free of said ethylenically unsaturated monomer.
Claim 2
Dependent Claim
64 words
A printing plate having addition polymerized and unpolymerized image areas which comprises a support bearing over its entire surface a layer comprised of a hydrophilic or oleophilic polymeric binder and in the addition polymerized image areas a polymerized ethylenically unsaturated monomer of hydrophilic or oleophilic character opposite that of the polymeric binder, the unpolymerized image areas being substantially free of said ethylenically unsaturated monomer.
Claim 3
Dependent Claim
20 words
A printing plate according to claim 1 wherein the hydrophilic and oleophilic image areas are in substantially the same plane.
Claim 4
Dependent Claim
39 words
A positive working printing plate according to claim 1 having oleophilic areas consisting essentially of a polymeric binder substantially free of ethylenically unsaturated compound and hydrophilic areas consisting essentially of said polymeric binder and a polymerized ethylenically unsaturated compound.
Claim 5
Dependent Claim
39 words
A negative working printing plate according to claim 1 having hydrophilic areas consisting essentially of a polymeric binder substantially free of ethylenically unsaturated compound and oleophilic areas consisting essentially of said polymeric binder and a polymerized ethylenically unsaturated compound.
Claim 6
Dependent Claim
43 words
A printing plate according to claim 3 wherein said polymeric binder is selected from polymethylmethacrylate, vinyl chloride/vinyl acetate/vinylidene chloride terpolymer, and polycaprolactone and said ethylenically unsaturated compound is water soluble in its unpolymerized state and substantially insoluble in water in its polymerized state.
Claim 7
Dependent Claim
24 words
A printing plate according to claim 5 wherein said ethylenically unsaturated compound is selected from polyoxyethyltrimethylolpropane triacrylate, tetraethylene glycol dimethacrylate, and triethylene glycol dimethacrylate.
Claim 8
Dependent Claim
43 words
A printing plate according to claim 4 wherein said polymeric binder is selected from cellulose acetatebutyrate, cellulose acetate, and hydroxypropyl cellulose and said ethylenically unsaturated compound is selected from trimethylol propane triacrylate, trimethylolpropane triacrylate, trimethylolpropane trimethacrylate, and polypropylene glycol ether of pentaerythritol tetra-acrylate.
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) | 1982-04-02 | 1982-10-02 | 1983-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-02 | 1986-10-02 | 1987-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-02 | 1990-10-02 | 1991-04-03 | $7700.00 | Window Closed / Lapsed |