US3886865A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Planographic printing plates comprising organic polysiloxanes
Assignee: Dai Nippon Printing Co Ltd
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Filing: 1974-05-03
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Granted: 1975-06-03
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Expires: 1994-05-03
Abstract
Abstract A planographic printing plate, on the base plate of which are ink-receptive and ink-repellent areas, the ink-repellent area being covered with a layer produced by polymerizing and curing a composition comprising a certain photopolymerizable organopolysiloxane, a photosensitizer and a solvent. The ink repellency is excellent, and such planographic printing plates have a superior printability on the press.
Inventors
- 👤 Michihiro Ohto
- 👤 Atsumi Noshiro
- 👤 Minoru Takamizawa
- 👤 Yoshio Inoue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:20
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/075; G03F7/0757; C; C08; C08G; C08G77/00; C08G77/42; C08G77/44; C09; C09D; C09D183/00; C09D183/04; C09D183/08
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
40 words
A planographic printing plate comprising a base plate having ink-receptive and ink-repellent areas thereon, said ink-repellent area being covered with an adhesively bonded layer of a polymerized and cured composition which comprises: a. a photopolymerizable organopolysiloxane of the general formula
Claim 2
Dependent Claim
40 words
A planographic printing plate comprising a base plate having ink-receptive and ink-repellent areas thereon, said ink-repellent area being covered with an adhesively bonded layer of a polymerized and cured composition which comprises: a. a photopolymerizable organopolysiloxane of the general formula
Claim 3
Dependent Claim
40 words
A PLANOGRAPHIC PRINTING PLATE COMPRISING A BASE PLATE HAVING INK-RECEPTIVE AND INK-REPELLENT AREAS THEREON, SAID INK-REPELLENT AREA BEING COVERED WITH AN ADHESIVELY BONDED LAYER OF A POLYMERIZED AND CURED COMPOSITION WHICH COMPRISES: A. A PHOTOPLYMERIZABLE ORGANOPOLYSILOXIANE OF THE GENERAL FORMULA
Claim 4
Dependent Claim
40 words
A PLANOGRAPHIC PRINTING PLATE COMPRISING A BASE PLATE HAVING INK-RECEPTIVE AND INK-REPELLENT AREAS THEREON, SAID INK-REPELLENT AREA BEING COVERED WITH AN ADHESIVELY BONDED LAYER OF A POLYMERIZED AND CURED COMPOSITION WHICH COMPRISES: A. A PHOTOPLYMERIZABLE ORGANOPOLYSILOXIANE OF THE GENERAL FORMULA
Claim 5
Dependent Claim
23 words
The planographic printing plate as claimed in claim 1 wherein said R1, R2, R3 and R4 are hydrogen, methyl, propylene, and methyl, respectively.
Claim 6
Dependent Claim
51 words
The planographic printing plate as claimed in claim 1 wherein said photosensitizer is selected from the group consisting of 4-phenylphenol, 4-nitroaniline, picramide, 2,6-dichloro-4-nitroaniline, 2,4-dinitrophenol, benzaldehyde, acetophenone, 4-4''-diaminobenzophenone, 4,4''-bisdimethylbenzophenone, benzoquinone, anthrquinone, 1,2-naphthoquinone, 3-methyl-1,3-diazo-1,9-benzanthrone, Malachite Green, Methylene Blue, Chrome Green, Rhodamine Blue, Azo Green- TEG, 2,4,6-triphenyl-pyrilium perchlorate, 2,4,6-triphenylthiapyrilium perchlorate, 2,4,6-triphenylpyrilium-fluoborate, and 2,4,6-triphenylthiapyrilium fluoborate.
Claim 7
Dependent Claim
29 words
The planographic printing plate as claimed in claim 1 wherein said solvent is selected from the group consisting of methylethyl ketone, methylisobutyl ketone, benzene, toluene, xylene, trichloroethylene, and tetrachloroethylene.
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) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |