Patent FR671492A successfully refreshed from Google Patents.
Patent US4504566A successfully refreshed from Google Patents.
US4504566A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single exposure positive contact multilayer photosolubilizable litho element with two quinone diazide layers
Assignee: Agfa Gevaert NV
•
Filing: 1984-06-22
•
Granted: 1985-03-12
•
Expires: 2004-06-22
Abstract
Abstract Multilayer photosolubilizable litho element comprising (1) support, (2) photosolubilizable dye or pigment-containing layer having an optical density in the visible region of the spectrum of at least 2.0 comprising a quinone diazide and at least one acidic polymeric binder, and (3) photosolubilizable layer comprising a quinone diazide compound and at least two acidic polymeric binders having carboxylic acid substituents, one binder having an acid number below 110, preferably poly(methylmethacrylate/methacrylic acid). The element is useful as a single exposure positive contact litho film.
Inventors
- 👤 Thomas E. Dueber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:28
CPC Classifications
G; G03; G03F; G03F1/00; G03F1/54; G03F1/56; G03F7/00; G03F7/004; G03F7/022; G03F7/023
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
187 words
A multilayer photosolubilizable litho element comprising, in order on a support, (1) a photosolubilizable solvent-soluble dye or pigment-containing layer, 0.0025 to 0.0064 mm in thickness, comprising at least one photosolubilizable quinone diazide compound in an amount of 4 to 40% by weight based on the dry weight of the layer, at least one acidic polymeric binder in an amount of 20 to 60% by weight based on the dry weight of the layer, and dye or pigment in an amount up to 50% by weight based on the dry weight of the layer, the layer having an optical density of at least 2.0 in the ultraviolet region of the spectrum, and (2) a clear photosolubilizable layer, 0.0013 to 0.005 mm in thickness, comprising 10 to 80% by weight based on the dry weight of layer of at least one photosolubilizable quinone diazide compound, and 20 to 90% by weight based on the dry weight of the layer of at least two polymeric binders having carboxylic acid substituents, one of said binders having an acid number below 110 and any other binder having an acid number below 300.
Claim 2
Dependent Claim
187 words
A multilayer photosolubilizable litho element comprising, in order on a support, (1) a photosolubilizable solvent-soluble dye or pigment-containing layer, 0.0025 to 0.0064 mm in thickness, comprising at least one photosolubilizable quinone diazide compound in an amount of 4 to 40% by weight based on the dry weight of the layer, at least one acidic polymeric binder in an amount of 20 to 60% by weight based on the dry weight of the layer, and dye or pigment in an amount up to 50% by weight based on the dry weight of the layer, the layer having an optical density of at least 2.0 in the ultraviolet region of the spectrum, and (2) a clear photosolubilizable layer, 0.0013 to 0.005 mm in thickness, comprising 10 to 80% by weight based on the dry weight of layer of at least one photosolubilizable quinone diazide compound, and 20 to 90% by weight based on the dry weight of the layer of at least two polymeric binders having carboxylic acid substituents, one of said binders having an acid number below 110 and any other binder having an acid number below 300.
Claim 3
Dependent Claim
28 words
An element according to claim 1 wherein the quinone diazide compounds may be the same or different in each layer and are esters or amides of 2-diazo-1-naphthol-5-sulfonic acid.
Claim 4
Dependent Claim
30 words
An element according to claim 1 wherein the quinone diazide compounds are taken from the group consisting of butyl carbitol 2-diazo-1-naphthol-5-sulfonate, 2,4-dihydroxybenzoic acid bis(2-diazo-1-naphthol-5-sulfonate), 3,5-dihydroxybenzoic acid bis(2-diazo-1-naphthol-5-sulfonate), and tetraethylene-glycol bis(2-diazo-1-naphthol-5-sulfonate).
Claim 5
Dependent Claim
26 words
An element according to claim 2 wherein the quinone diazide compound in layer (1) is butyl carbitol 2-diazo-1-naphthol-5-sulfonate and in layer (2) is 2,4-dihydroxybenzoic acid bis(2-diazo-1-naphthol-5-sulfonate).
Claim 6
Dependent Claim
15 words
An element according to claim 1 wherein layer (1) contains carbon black as a pigment.
Claim 7
Dependent Claim
18 words
An element according to claim 1 wherein the polymeric binder of layer (1) is ethyl acrylate/methyl methacrylate/acrylic acid.
Claim 8
Dependent Claim
28 words
An element according to claim 6 wherein polymeric binders in layer (2) are poly(methylmethacrylate/methacrylic acid), styrene/maleic anhydride copolymer esterified with butanol mixture, and ethyl acrylate/methyl methacrylate/acrylic acid copolymer.
Claim 9
Dependent Claim
89 words
An element according to claim 7 wherein layer (1) comprises 10 to 20 parts by weight of quinone diazide compound and 80 to 90 parts by weight of a mixture of dye or pigment and said terpolymer, and layer (2) comprises 20 to 40 parts by weight of quinone diazide compound, 40 to 50 parts by weight of said styrene/maleic anhydride copolymer esterified with a butanol mixture, 5 to 20 parts by weight of ethyl acrylate/methyl methacrylate/acrylic acid copolymer, and 10 to 20 parts by weight of poly(methylmethacrylate/methacrylic acid).
Claim 10
Dependent Claim
21 words
An element according to claim 1 having an optical density of at least 2.0 in the visible region of the spectrum.
References Cited (Backward Citations)
US3458311A
Cited
US3634082A
Cited
US3837860A
Cited
US3890148A
Cited
US3900325A
Cited
US4093464A
Cited
US4217407A
Cited
GB1493834A
Cited
GB1493833A
Cited
US4173673A
Cited
US4337308A
Cited
US4123272A
Cited
US4311784A
Cited
US4238559A
Cited
US4349620A
Cited
US4353978A
Cited
US4260673A
Cited
US4378264A
Cited
US4405394A
Cited
US4370405A
Cited
US4409115A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-03-11 | 1988-09-10 | 1989-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-11 | 1992-09-10 | 1993-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-11 | 1996-09-10 | 1997-03-12 | $7700.00 | Window Closed / Lapsed |