US4425424A
Expired / Lapsed
US
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Dye-forming compositions
Assignee: Eastman Kodak Co
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Filing: 1982-06-21
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Granted: 1984-01-10
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Expires: 2002-06-21
Abstract
Abstract There is disclosed a radiation-sensitive composition comprising a leuco dye and a sulfonyloxy-N photooxidant that converts the leuco dye to a dye having a color different from that of its leuco form, when exposed to activating radiation. Improved print-out densities are obtained using this composition in image-forming methods.
Inventors
- 👤 Henry W. Altland
- 👤 Raymond W. Ryan, Jr.
- 👤 Phillip P. Senise, Jr.
- 👤 Michael J. Lindstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:25
CPC Classifications
C; C07; C07D; C07D209/00; C07D209/02; C07D209/44; C07D209/48; C07D221/00; C07D221/02; C07D221/04; C07D221/06; C07D221/14; G; G03; G03C; G03C1/00; G03C1/72; G03C1/73; G03C1/732; Y; Y10; Y10S; Y10S430/00; Y10S430/1053; Y10S430/1055; Y10S430/114; Y10S430/12; Y10S430/121
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
134 words
In an activating radiation-sensitive imaging composition comprising (1) a leuco form of a dye having one or more removable hydrogen atoms the removal of which forms a compound colored differently from the leuco form and (2) a photooxidant capable of converting said leuco dye to said differently colored form when said composition is exposed to activating radiation, the improvement wherein said photooxidant has the structural formula ##STR18## wherein R 1 is a carbocyclic or heterocyclic ring containing from 5 to 10 ring atoms, and Z represents the non-metallic atoms necessary to complete 1 or more rings containing from 5 to 17 ring atoms, said photooxidant being present in an amount effective to provide an improved difference density of said colored form compared to the difference density produced by the same composition lacking said photooxidant.
Claim 2
Dependent Claim
134 words
In an activating radiation-sensitive imaging composition comprising (1) a leuco form of a dye having one or more removable hydrogen atoms the removal of which forms a compound colored differently from the leuco form and (2) a photooxidant capable of converting said leuco dye to said differently colored form when said composition is exposed to activating radiation, the improvement wherein said photooxidant has the structural formula ##STR18## wherein R 1 is a carbocyclic or heterocyclic ring containing from 5 to 10 ring atoms, and Z represents the non-metallic atoms necessary to complete 1 or more rings containing from 5 to 17 ring atoms, said photooxidant being present in an amount effective to provide an improved difference density of said colored form compared to the difference density produced by the same composition lacking said photooxidant.
Claim 3
Dependent Claim
134 words
In an activating radiation-sensitive imaging composition comprising (1) a leuco form of a dye having one or more removable hydrogen atoms the removal of which forms a compound colored differently from the leuco form and (2) a photooxidant capable of converting said leuco dye to said differently colored form when said composition is exposed to activating radiation, the improvement wherein said photooxidant has the structural formula ##STR19## wherein R 1 is a carbocyclic or heterocyclic ring containing from 5 to 10 ring atoms, and Z represents the non-metallic atoms necessary to complete 1 or more rings containing from 5 to 17 ring atoms, said photooxidant being present in an amount effective to provide an improved difference density of said colored form compared to the difference density produced by the same composition lacking said photooxidant.
Claim 4
Dependent Claim
134 words
In an activating radiation-sensitive imaging composition comprising (1) a leuco form of a dye having one or more removable hydrogen atoms the removal of which forms a compound colored differently from the leuco form and (2) a photooxidant capable of converting said leuco dye to said differently colored form when said composition is exposed to activating radiation, the improvement wherein said photooxidant has the structural formula ##STR19## wherein R 1 is a carbocyclic or heterocyclic ring containing from 5 to 10 ring atoms, and Z represents the non-metallic atoms necessary to complete 1 or more rings containing from 5 to 17 ring atoms, said photooxidant being present in an amount effective to provide an improved difference density of said colored form compared to the difference density produced by the same composition lacking said photooxidant.
Claim 5
Dependent Claim
21 words
A composition as defined in claim 1 or 2, wherein said leuco form of said dye is a leuco aminotriarylmethane dye.
Claim 6
Dependent Claim
14 words
A composition as defined in claim 1 or 2, wherein R 1 is aryl.
Claim 7
Dependent Claim
14 words
A composition as defined in claim 1 or 2, wherein R 1 is phenyl.
Claim 8
Dependent Claim
14 words
A composition as defined in claim 1 or 2, wherein R 1 is p-chlorophenyl.
Claim 9
Dependent Claim
16 words
A composition as defined in claim 1, wherein Z comprises from 3 to 15 carbon atoms.
Claim 10
Dependent Claim
15 words
A composition as defined in claim 1 or 2, wherein said photooxidant is a phthalimide.
Claim 11
Dependent Claim
15 words
A composition as defined in claim 1 or 2, wherein said photooxidant is a naphthalimide.
Claim 12
Dependent Claim
14 words
A composition as defined in claim 1 or 2, wherein said photooxidant is N-(4-chlorobenzenesulfonyloxy)-1,8-naphthalimide.
Claim 13
Dependent Claim
14 words
A composition as defined in claim 1 or 2, wherein said photooxidant is N-(4-chlorobenzenesulfonyloxy)phthalimide.
Claim 14
Dependent Claim
14 words
A composition as defined in claim 1 or 2, wherein said photooxidant is N-benzenesulfonyloxyphthalimide.
Claim 15
Dependent Claim
14 words
A composition as defined in claim 1 or 2, wherein said photooxidant is N-benzenesulfonyloxy-1,8-naphthalimide.
Claim 16
Dependent Claim
21 words
A composition as defined in claim 1 or 2, and further including a negative-working or positive-working photopolymer and optionally a photosensitizer.
Claim 17
Dependent Claim
148 words
In an imaging element useful to obtain a lithographic printing plate, comprising a support, and on the support, a composition comprising a negative-working photopolymer, a photosensitizer, a leuco form of a dye having one or more removable hydrogen atoms the removal of which forms a compound colored differently from the leuco form and a photooxidant capable of converting said leuco dye to said differently colored form when exposed to activating radiation, the improvement wherein said photooxidant has the structural formula ##STR20## wherein R 1 is a carbocyclic or heterocyclic ring containing from 5 to 10 ring atoms, and Z represents the non-metallic atoms necessary to complete 1 or more rings containing from 5 to 17 ring atoms, said photooxidant being present in an amount effective to provide an improved difference density of said colored form compared to the difference density produced by the same composition lacking said photooxidant.
Claim 18
Dependent Claim
148 words
In an imaging element useful to obtain a lithographic printing plate, comprising a support, and on the support, a composition comprising a negative-working photopolymer, a photosensitizer, a leuco form of a dye having one or more removable hydrogen atoms the removal of which forms a compound colored differently from the leuco form and a photooxidant capable of converting said leuco dye to said differently colored form when exposed to activating radiation, the improvement wherein said photooxidant has the structural formula ##STR20## wherein R 1 is a carbocyclic or heterocyclic ring containing from 5 to 10 ring atoms, and Z represents the non-metallic atoms necessary to complete 1 or more rings containing from 5 to 17 ring atoms, said photooxidant being present in an amount effective to provide an improved difference density of said colored form compared to the difference density produced by the same composition lacking said photooxidant.
Claim 19
Dependent Claim
152 words
In an imaging element useful to obtain a lithographic printing plate, a comprising a support, and on the support, a composition comprising a negative-working photopolymer, a photosensitizer, a leuco form of a dye having one or more removable hydrogen atoms the removal of which forms a compound colored differently from the leuco form and a photooxidant capable of converting said leuco dye to said differently colored form when said composition is exposed to activating radiation, the improvement wherein said photooxidant has the structural formula ##STR21## wherein R 1 is a carbocyclic or heterocyclic ring containing from 5 to 10 ring atoms, and Z represents the non-metallic atoms necessary to complete 1 or more rings containing from 5 to 17 ring atoms, said photooxidant being present in an amount effective to provide an improved difference density of said colored form compared to the difference density produced by the same composition lacking said photooxidant.
Claim 20
Dependent Claim
152 words
In an imaging element useful to obtain a lithographic printing plate, a comprising a support, and on the support, a composition comprising a negative-working photopolymer, a photosensitizer, a leuco form of a dye having one or more removable hydrogen atoms the removal of which forms a compound colored differently from the leuco form and a photooxidant capable of converting said leuco dye to said differently colored form when said composition is exposed to activating radiation, the improvement wherein said photooxidant has the structural formula ##STR21## wherein R 1 is a carbocyclic or heterocyclic ring containing from 5 to 10 ring atoms, and Z represents the non-metallic atoms necessary to complete 1 or more rings containing from 5 to 17 ring atoms, said photooxidant being present in an amount effective to provide an improved difference density of said colored form compared to the difference density produced by the same composition lacking said photooxidant.
Claim 21
Dependent Claim
132 words
In a method of forming an image, comprising the step of imagewise exposing to activating radiation a composition comprising a print-out leuco dye having one or more removable hydrogen atoms the removal of which forms a compound colored differently from the leuco form, the improvement wherein the print-out density of said leuco dye is increased by means of a photooxidant having the structural formula ##STR22## wherein R 1 is a carbocyclic or heterocyclic ring containing from 5 to 10 ring atoms, and Z represents the non-metallic atoms necessary to complete 1 or more rings containing from 5 to 17 ring atoms, said photooxidant being present in an amount effective to provide an improved difference density of said colored form compared to the difference density produced by the same composition lacking said photooxidant.
Claim 22
Dependent Claim
132 words
In a method of forming an image, comprising the step of imagewise exposing to activating radiation a composition comprising a print-out leuco dye having one or more removable hydrogen atoms the removal of which forms a compound colored differently from the leuco form, the improvement wherein the print-out density of said leuco dye is increased by means of a photooxidant having the structural formula ##STR22## wherein R 1 is a carbocyclic or heterocyclic ring containing from 5 to 10 ring atoms, and Z represents the non-metallic atoms necessary to complete 1 or more rings containing from 5 to 17 ring atoms, said photooxidant being present in an amount effective to provide an improved difference density of said colored form compared to the difference density produced by the same composition lacking said photooxidant.
Claim 23
Dependent Claim
133 words
In a method of forming an image, comprising the step of imagewise exposing to activating radiation a composition comprising a print-out leuco dye having one or more removable hydrogen atoms the removal of which forms a compound color differently from the leuco form, the improvement wherein the print-out density of said leuco dye is increased by means of a photooxidant having the structural formula ##STR23## wherein R 1 is a carbocyclic or heterocyclic ring containing from 5 to 10 ring atoms, and Z represents the non-metallic atoms necessary to complete 1 or more rings containing from 5 to b 17 ring atoms, said photooxidant being present in an amount effective to provide an improved difference density of said colored form compared to the difference density produced by the same composition lacking said photooxidant.
Claim 24
Dependent Claim
133 words
In a method of forming an image, comprising the step of imagewise exposing to activating radiation a composition comprising a print-out leuco dye having one or more removable hydrogen atoms the removal of which forms a compound color differently from the leuco form, the improvement wherein the print-out density of said leuco dye is increased by means of a photooxidant having the structural formula ##STR23## wherein R 1 is a carbocyclic or heterocyclic ring containing from 5 to 10 ring atoms, and Z represents the non-metallic atoms necessary to complete 1 or more rings containing from 5 to b 17 ring atoms, said photooxidant being present in an amount effective to provide an improved difference density of said colored form compared to the difference density produced by the same composition lacking said photooxidant.
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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) | 1987-01-09 | 1987-07-11 | 1988-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-09 | 1991-07-11 | 1992-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-09 | 1995-07-11 | 1996-01-10 | $7700.00 | Window Closed / Lapsed |