Patent US4087584A successfully refreshed from Google Patents.
US4087584A
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US
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Lithographic printing plate
Assignee: Ricoh Co Ltd
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Filing: 1976-10-20
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Granted: 1978-05-02
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Expires: 1996-10-20
Abstract
Abstract A lithographic printing plate which comprises using in an ink-repellent layer a polymer of a monomer or a copolymer containing said monomer, said monomer being represented by the following general formulas: ##STR1## WHEREIN: R is hydrogen or a methyl radical; R' is hydrogen or an alkyl radical having 1 to 10 carbon atoms; Rf is a perfluoroalkyl radical having 3 to 21 carbon atoms; and n is an integer of 1 to 10.
Inventors
- 👤 Hiroyoshi Taniguchi
- 👤 Takao Igawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:24
CPC Classifications
B; B41; B41N; B41N1/00; B41N1/003; G; G03; G03G; G03G13/00; G03G13/26; G03G13/28; G03G13/286; Y; Y10; Y10S; Y10S428/00; Y10S428/908; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154; Y10T428/31544
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
75 words
A lithographic printing plate comprising a support having an ink-repellent layer thereon, said ink-repellent layer consisting essentially of a polymer of a first monomer having the formula ##STR11## wherein R is hydrogen or methyl, Rf is perfluoroalkyl having from 3 to 21 carbon atoms, and n is an integer of one to 10, said polymer containing up to 25 percent by weight of units of a second monomer which is copolymerizable with said first monomer.
Claim 2
Dependent Claim
75 words
A lithographic printing plate comprising a support having an ink-repellent layer thereon, said ink-repellent layer consisting essentially of a polymer of a first monomer having the formula ##STR11## wherein R is hydrogen or methyl, Rf is perfluoroalkyl having from 3 to 21 carbon atoms, and n is an integer of one to 10, said polymer containing up to 25 percent by weight of units of a second monomer which is copolymerizable with said first monomer.
Claim 3
Dependent Claim
165 words
A printing plate according to claim 1 wherein said second monomer is at least one member selected from the group consisting of (1) acrylic acid, methacrylic acid and the methyl, ethyl, butyl, isobutyl, propyl, 2-ethylhexyl, hexyl, decyl, lauryl, stearyl, β-hydroxyethyl and glycidyl esters thereof, (2) vinyl esters of aliphatic acids selected from the group consisting of acetic acid, propionic acid, caprylic acid, lauric acid and stearic acid, (3) styrene compounds selected from the group consisting of styrene, β-methyl styrene and β-methyl styrene, (4) vinyl and vinylidene halides selected from the group consisting of vinyl fluoride, vinyl chloride, vinyl bromide, vinylidene fluoride and vinylidene chloride, (5) allyl esters of aliphatic acids selected from the group consisting of heptanoic acid, caprylic acid and caproic acid, (6) vinyl alkyl ketones selected from the group consisting of vinyl methyl ketone and vinyl ethyl ketone, (7) acrylamides selected from the group consisting of N-methyl acrylamide and N-methylol methacrylamide, and (8) dienes selected from the group consisting of 2,3-dichloro-1,3-butadiene and isoprene.
Claim 4
Dependent Claim
63 words
A lithographic printing plate according to claim 1 in which said second monomer is at least one member selected from the group consisting of (1) acrylic acid, methacrylic acid and esters thereof, (2) vinyl esters of aliphatic carboxylic acids, (3) styrene compounds, (4) vinyl and vinylidene halides, (5) allyl esters of aliphatic carboxylic acids, (6) vinyl alkyl ketones, (7) acrylamides and (8) dienes.
Claim 5
Dependent Claim
16 words
A lithographic printing plate according to claim 1 consisting of said support and said ink-repellent layer.
Claim 6
Dependent Claim
30 words
A lithographic printing plate according to claim 1 consisting of said support, a photoconductive layer on top of said support and said ink-repellent layer on top of said photoconductive layer.
Claim 7
Dependent Claim
21 words
A lithographic printing plate according to claim 1 in which the recurring structural units of said polymer have the formula ##STR12##
Claim 8
Dependent Claim
18 words
A lithographic printing plate according to claim 1 in which said polymer has the formula ##STR13## wherein m:n=80:20.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-01 | 1981-10-31 | 1982-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-01 | 1985-10-31 | 1986-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-01 | 1989-10-31 | 1990-05-02 | $7700.00 | Window Closed / Lapsed |