US3926643A
Expired / Lapsed
US
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Photopolymerizable compositions comprising initiator combinations comprising thioxanthenones
Assignee: EIDP Inc
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Filing: 1974-05-16
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Granted: 1975-12-16
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Expires: 1994-05-16
Abstract
Abstract Thioxanthenones are used as photoinitiators, in admixture with other initiators, e.g., polynuclear quinones, lophine dimers, etc., in photopolymerizable systems.
Inventors
- 👤 Catherine Teh-Lin Chang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:14
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/027; G03F7/028; G03F7/031; Y; Y10; Y10S; Y10S430/00; Y10S430/1053; Y10S430/1055; Y10S430/106; Y10S430/111; Y10S430/112; Y10S430/114; Y10S430/122; Y10S430/123; Y10S430/124; Y10S430/125
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
39 words
IN A PHOTOPOLYMERIZABLE COMPOSITION THE IMPROVEMENT COMPRISING THE COMBINATION OF A THIOXANTHENONE PHOTOINITIATOR AND AT LEAST ONE OTHER PHOTOINITIATOR SELECTED FROM THE GROUP CONSISTING OF A LOPHINE DIMER, A POLYNUCLEAR QUINONE COMPOUND, 2,3-BORNANEDIONE, 4,4''-BIS(DIMETHYLAMINO) BENZOPHENONE, AND BENZOIN METHYL ETHER.
Claim 2
Dependent Claim
39 words
IN A PHOTOPOLYMERIZABLE COMPOSITION THE IMPROVEMENT COMPRISING THE COMBINATION OF A THIOXANTHENONE PHOTOINITIATOR AND AT LEAST ONE OTHER PHOTOINITIATOR SELECTED FROM THE GROUP CONSISTING OF A LOPHINE DIMER, A POLYNUCLEAR QUINONE COMPOUND, 2,3-BORNANEDIONE, 4,4''-BIS(DIMETHYLAMINO) BENZOPHENONE, AND BENZOIN METHYL ETHER.
Claim 3
Dependent Claim
15 words
A photopolymerizable composition according to claim 1 wherein said lophine dimer is 2-o-chlorophenyl-4,5-bis(m-methoxyphenyl) imidazolyl dimer.
Claim 4
Dependent Claim
20 words
A photopolymerizable composition according to claim 1 wherein said polynuclear quinone compound is selected from an anthraquinone and a phenanthrenequinone.
Claim 5
Dependent Claim
16 words
A photopolymerizable composition according to claim 1, said thioxanthenone being selected from thioxanthenone, 2-chlorothioxanthenone, and 3,6-bis(dimethylamino)-thioxanthenone.
Claim 6
Dependent Claim
42 words
A photopolymerizable composition according to claim 1 containing a macromolecular organic binder and an ethylenically unsaturated compound capable of free radical generated addition polymerization, said thioxanthenone photoinitiator being present in an amount of at least 0.02 percent by weight of said composition.
Claim 7
Dependent Claim
25 words
A photopolymerizable composition according to claim 1, said other photoinitiator being present in an amount of at least 0.05 percent by weight of said composition.
Claim 8
Dependent Claim
15 words
A photosensitive element comprising a support bearing a layer of the composition of claim 5.
Claim 9
Dependent Claim
36 words
A photosensitive element according to claim 7, said composition containing a macromolecular acrylic polYmer binder, an ethylenically unsaturated compound having at least two acrylate groups, and an initiating amount of a mixture of 9,10-phenanthrenequinone and thioxanthenone.
Claim 10
Dependent Claim
15 words
IN A PHOTOPOLYMERIZABLE COMPOSITION THE IMPROVEMENT COMPRISING A PHOTOINITIATING MIXTURE OF THIOXANTHERNONE AND 3,6-BIS(METHYLAMINO) THIOXANTHENONE.
Claim 11
Dependent Claim
15 words
IN A PHOTOPOLYMERIZABLE COMPOSITION THE IMPROVEMENT COMPRISING A PHOTOINITIATING MIXTURE OF THIOXANTHERNONE AND 3,6-BIS(METHYLAMINO) THIOXANTHENONE.
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) | 1978-12-15 | 1979-06-16 | 1979-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-15 | 1983-06-16 | 1983-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-15 | 1987-06-16 | 1987-12-16 | $7700.00 | Window Closed / Lapsed |