Patent US5340681A successfully refreshed from Google Patents.
US5340681A
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Method for preparing photographic elements having single photosensitive layer containing photopolymerizable compound, photoinitiator, diazonium compound and barrier material encapsulated pigment particles; and negative image formation process
Assignee: Eastman Kodak Co
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Filing: 1993-11-05
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Granted: 1994-08-23
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Expires: 2013-11-05
Abstract
Abstract Photopolymeric printing plates are presented wherein and electrochemically etched and anodized, silicated aluminum substrate has a single photosensitive coating thereon composed of a photopolymerizable combination which includes a photopolymerizable pigment dispersion, a photosensitive lithographic diazonium resin, multifunctional acrylate oligomer, multifunctional acrylate monomer, photopolymerizable binder and photoinitiator to yield a non-tacky, mar resistant, easily developed durable plate. In a preferred embodiment, an additional aqueous, non-photosensitive overcoat is applied over the initial coating to retard oxygen inhibition.
Inventors
- 👤 Maria T. Sypek
- 👤 Paul A. Perron
- 👤 Gary V. Grosclaude
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:24
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/027; G03F7/09; G03F7/095; G03F7/0955; G03F7/105
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
183 words
A method for preparing a photographic element which comprises, forming a light sensitive, photopolymerizable composition which comprises an admixture of: a.) a substantially homogeneous pigment composition, which pigment composition comprises pigment particles which are substantially pre-encapsulated by a barrier material, which barrier material comprises one or more photopolymerizable monomer, oligomer or polymer components capable of being photopolymerized and which resists de-encapsulation when in admixture with the other components of the photosensitive composition, said pigment composition being present in an amount sufficient to substantially uniformly color the photosensitive composition; and b.) at least one photopolymerizable monomer, oligomer or polymer binder in an amount sufficient to form a substantially uniform photopolymerizable composition; and c.) at least one photoinitiator in an amount sufficient to effect photopolymerization of the barrier material and the photopolymerizable monomer, oligomer or polymer binder upon exposure to sufficient actinic radiation; and d. at least one diazonium compound in an amount sufficient to form a light sensitive composition; and coating a substrate with a substantially uniform layer of said photopolymerizable composition in the absence of any other light sensitive composition on said substrate.
Claim 2
Independent Claim
183 words
A method for preparing a photographic element which comprises, forming a light sensitive, photopolymerizable composition which comprises an admixture of: a.) a substantially homogeneous pigment composition, which pigment composition comprises pigment particles which are substantially pre-encapsulated by a barrier material, which barrier material comprises one or more photopolymerizable monomer, oligomer or polymer components capable of being photopolymerized and which resists de-encapsulation when in admixture with the other components of the photosensitive composition, said pigment composition being present in an amount sufficient to substantially uniformly color the photosensitive composition; and b.) at least one photopolymerizable monomer, oligomer or polymer binder in an amount sufficient to form a substantially uniform photopolymerizable composition; and c.) at least one photoinitiator in an amount sufficient to effect photopolymerization of the barrier material and the photopolymerizable monomer, oligomer or polymer binder upon exposure to sufficient actinic radiation; and d. at least one diazonium compound in an amount sufficient to form a light sensitive composition; and coating a substrate with a substantially uniform layer of said photopolymerizable composition in the absence of any other light sensitive composition on said substrate.
Claim 3
Dependent Claim
47 words
The method of claim 1 wherein said pigment composition comprises from about 20% to about 80% by weight of the pigment composition of at least one organic or inorganic pigment and from about 20% to about 80% by weight of the pigment composition of said barrier material.
Claim 4
Dependent Claim
31 words
The method of claim 1 wherein said pigment composition is present in the photopolymerizable composition in an amount of from about 0.1% and about 30% by weight of the photopolymerizable composition.
Claim 5
Dependent Claim
31 words
The method of claim 1 wherein said photopolymerizable monomer, oligomer or polymer binder is present in an amount of from about 0.1% to about 60% by weight of the photopolymerizable composition.
Claim 6
Dependent Claim
30 words
The method of claim 1 wherein said photoinitiator is present in the photopolymerizable composition in an amount of from about 0.10% to about 10.0% by weight of the photopolymerizable composition.
Claim 7
Dependent Claim
22 words
The method of claim 1 wherein said diazonium compound comprises from about 0.05% to about 10% by weight of the photopolymerizable composition.
Claim 8
Dependent Claim
28 words
The method of claim 1 wherein said photopolymerizable barrier material comprises a combination of at least one photopolymerizable monomer, oligomer, or polymer and at least one non-photopolymerizable polymer.
Claim 9
Dependent Claim
27 words
The method of claim 7 wherein the ratio of photopolymerizable monomer, oligomer, or polymer to non-photopolymerizable polymer in the barrier is from about 4:1 to about 1:4.
Claim 10
Dependent Claim
66 words
The method of claim 1 wherein said photopolymerizable binder comprises from about 0.1% and about 20% by weight of at least one photopolymerizable multifunctional acrylate oligomer; and from about 0.1% and about 20% by weight of at least one photopolymerizable multifunctional acrylate monomer; and from about 0.1% and about 20% by weight of at least one photopolymerizable polymer based on the weight of the photopolymerizable composition.
Claim 11
Dependent Claim
24 words
The method of claim 9 wherein said multifunctional acrylate oligomer is selected from the group consisting of acrylated epoxies, acrylated polyurethanes and acrylated polyesters.
Claim 12
Dependent Claim
28 words
The method of claim 9 wherein said multifunctional acrylate monomer is selected from the group consisting of trimethylolpropane triacrylate, trimethylolpropane propoxylate triacrylate, trimethylolpropane ethoxylate triacrylate, and pentaerythritol tetraacrylate.
Claim 13
Dependent Claim
28 words
The method of claim 9 wherein said photopolymerizable polymer is selected from the group consisting of acrylamido substituted cellulose esters, acrylated polyurethanes, acrylated polyvinylbutyral and acrylamido substituted polyvinylbutyral.
Claim 14
Dependent Claim
35 words
The method of claim 1 wherein said diazonium compound comprises salts of the condensation product of at least one monomeric organic diazonium compound with at least one active methylene group containing compound condensed in acid.
Claim 15
Dependent Claim
10 words
The method of claim 1 wherein said substrate is transparent.
Claim 16
Dependent Claim
10 words
The method of claim 1 wherein the substrate comprises aluminum.
Claim 17
Dependent Claim
29 words
The method of claim 15 wherein the aluminum substrate has been prepared by one or more treatments selected from the group consisting of graining, electrochemical etching, anodizing and hydrophilizing.
Claim 18
Dependent Claim
14 words
The method of claim 16 wherein the hydrophilizing is conducted with a silicating treatment.
Claim 19
Dependent Claim
19 words
The method of claim 1 further comprising applying a non-photosensitive oxygen barrier overcoat layer over said photopolymerizable composition layer.
Claim 20
Dependent Claim
21 words
The method of claim 18 wherein said overcoat layer comprises an aqueous solution of at least one water soluble polymeric material.
Claim 21
Dependent Claim
21 words
The method of claim 18 wherein said overcoat layer comprises an aqueous dispersion of at least one non-water soluble polymeric material.
Claim 22
Dependent Claim
36 words
The method of claim 18 wherein said overcoat layer comprises a combination of an aqueous dispersion of at least one non-water soluble polymer material and an aqueous solution of at least one water soluble polymeric material.
Claim 23
Dependent Claim
375 words
The method of claim 17 wherein i. ) the pigment composition is present in the photopolymerizable composition in an amount of from about 0.1% and about 30% by weight of the photopolymerizable composition; and ii. ) the photopolymerizable monomer, oligomer or polymer binder is present in an amount of from about 0.1% and about 60% by weight of the photopolymerizable composition; and iii. ) the photoinitiator is present in the photopolymerizable composition in an amount of from about 0.10% to about 10.0% by weight of the photopolymerizable composition; and iv. ) the diazonium compound comprises from about 0.05% and 10% by weight of the photopolymerizable composition; and v. ) the photopolymerizable barrier comprises a combination of at least one photopolymerizable monomer, oligomer, or polymer and at least one non-photopolymerizable polymer wherein the ratio of photopolymerizable monomer, oligomer, or polymer to non-photopolymerizable polymer in the barrier is from about 4:1 to about 1:4; and vi. ) the photopolymerizable binder comprises from about 0.1% and about 20% by weight of at least one photopolymerizable multifunctional acrylate oligomer; and from about 0.1% and about 20% by weight of at least one photopolymerizable multifunctional acrylate monomer; and from about 0.1% and about 20% by weight of at least one photopolymerizable polymer based on the weight of the photopolymerizable composition; and vii. ) wherein said multifunctional acrylate oligomer is selected from the group consisting of acrylated epoxies, acrylated polyurethanes and acrylated polyesters; and viii.) wherein said multifunctional acrylate monomer is selected from the group consisting of trimethylolpropane triacrylate, trimethylolpropane propoxylate triacrylate, trimethylolpropane ethoxylate triacrylate, and pentaerythritol tetraacrylate; and ix.) wherein said photopolymerizable polymer is selected from the group consisting of acrylamido substituted cellulose esters, acrylated polyurethanes, acrylated polyvinylbutyral and acrylamido substituted polyvinylbutyral; and x.) wherein said diazonium compound comprises salts of the condensation product of at least one monomeric organic diazonium compound with at least one active methylene group containing compound condensed in acid; and xi. ) wherein said single photopolymerizable composition layer further comprises a non-photosensitive oxygen barrier overcoat layer over said photopolymerizable composition, which overcoat layer comprises one or more components selected from the group consisting of an aqueous dispersion of a non-water soluble polymer material and an aqueous solution of at least one water soluble polymeric material.
Claim 24
Independent Claim
216 words
A method for forming an image which comprises I. preparing a photographic element by forming a light sensitive, photopolymerizable composition which comprises an admixture of: a.) a substantially homogeneous pigment composition, which pigment composition comprises pigment particles which are substantially pre-encapsulated by a barrier material, which barrier material comprises one or more photopolymerizable monomer, oligomer or polymer components capable of being photopolymerized and which resists de-encapsulation when in admixture with the other components of the photosensitive composition, said pigment composition being present in an amount sufficient to substantially uniformly color the photosensitive composition; and b.) at least one photopolymerizable monomer, oligomer or polymer binder in an amount sufficient to form a substantially uniform photopolymerizable composition; and c.) at least one photoinitiator in an amount sufficient to effect photopolymerization of the barrier material and the photopolymerizable monomer, oligomer or polymer binder upon exposure to sufficient actinic radiation; and d.) at least one diazonium compound in an amount sufficient to form a light sensitive composition; and II. coating a subtrate with a substantially uniform layer of said photopolymerizable composition in the absence of any other light sensitive composition on said substrate; and III. imagewise exposing the layer to actinic radiation; and IV. removing the imagewise unexposed, non-image portions of the layer of photopolymerizable composition with a developing solution.
Claim 25
Independent Claim
216 words
A method for forming an image which comprises I. preparing a photographic element by forming a light sensitive, photopolymerizable composition which comprises an admixture of: a.) a substantially homogeneous pigment composition, which pigment composition comprises pigment particles which are substantially pre-encapsulated by a barrier material, which barrier material comprises one or more photopolymerizable monomer, oligomer or polymer components capable of being photopolymerized and which resists de-encapsulation when in admixture with the other components of the photosensitive composition, said pigment composition being present in an amount sufficient to substantially uniformly color the photosensitive composition; and b.) at least one photopolymerizable monomer, oligomer or polymer binder in an amount sufficient to form a substantially uniform photopolymerizable composition; and c.) at least one photoinitiator in an amount sufficient to effect photopolymerization of the barrier material and the photopolymerizable monomer, oligomer or polymer binder upon exposure to sufficient actinic radiation; and d.) at least one diazonium compound in an amount sufficient to form a light sensitive composition; and II. coating a subtrate with a substantially uniform layer of said photopolymerizable composition in the absence of any other light sensitive composition on said substrate; and III. imagewise exposing the layer to actinic radiation; and IV. removing the imagewise unexposed, non-image portions of the layer of photopolymerizable composition with a developing solution.
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) | 1997-08-22 | 1998-02-21 | 1998-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-08-22 | 2002-02-21 | 2002-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-08-22 | 2006-02-21 | 2006-08-23 | $7700.00 | Window Closed / Lapsed |