US4954415A
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Photoinitiator compositions containing O-acylthiohydroxamate or an N-alkoxypyridinethione and photohardenable compositions containing the same
Assignee: Mead Corp
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Filing: 1989-03-09
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Granted: 1990-09-04
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Expires: 2009-03-09
Abstract
Abstract A photoinitiator composition comprising a compound which absorbs actinic radiation and directly or indirectly generates free radicals, and an O-acylthiohydroxamate compound or an N-alkoxypyridine thione; photohardenable compositions containing that photoinitiator composition; and photosensitive materials employing same.
Inventors
- 👤 Paul D. Davis
- 👤 Gary B. Schuster
- 👤 Jacqueline G. Truini
- 👤 Al Fentiman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:04
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03F; G03F7/00; G03F7/002; A; A01; A01C; A01C11/00; A01C11/02; G03F7/004; G03F7/027; G03F7/028; G03F7/031; Y; Y10; Y10S; Y10S430/00; Y10S430/1053; Y10S430/1055; Y10S430/114; Y10S430/116; Y10S430/12; Y10S430/121
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
39 words
A photohardenable composition comprising a free radical addition polymerizable or crosslinkable material and a photoinitiator composition, said photoinitiator composition including a compound which absorbs actinic radiation and directly or indirectly generates free radicals, and an O-acylthiohydroxamate or an N-alkoxypyridinethione.
Claim 2
Dependent Claim
39 words
A photohardenable composition comprising a free radical addition polymerizable or crosslinkable material and a photoinitiator composition, said photoinitiator composition including a compound which absorbs actinic radiation and directly or indirectly generates free radicals, and an O-acylthiohydroxamate or an N-alkoxypyridinethione.
Claim 3
Dependent Claim
104 words
The composition of claim 1 wherein said O-acylthiohydroxamate or N-alkoxypyridinethione is a compound of the formula (I): ##STR10## where T represents a straight chain, branched chain or cyclic alkyl group having 1 to 30 carbon atoms, or a group of the formula --OCR where R represents an alkyl group, A is a member selected from the group consisting of a direct bond, --S--, --NR'CO-- and --NR'--; R' represents an alkyl group or an aryl group, and Z represents the atoms necessary to complete a saturated or unsaturated 5 or 6 membered heterocyclic ring which may be condensed with a mononuclear or polynuclear aromatic ring.
Claim 4
Dependent Claim
12 words
The composition of claim 2 wherein said composition additionally contains a thiol.
Claim 5
Dependent Claim
54 words
The composition of claim 2 wherein A in combination with Z represents the atoms necessary to complete a ring selected from the group consisting of a substituted or unsubstituted N-oxy pyridine-2 thione ring, N-oxy (benz)thiazolin-2-thione ring, N-oxy (benz)imidazol-2-thione ring, N-oxy(benz)oxazolin-2-thione ring, N-oxy (benz)selenazolin-2-thione ring, N-oxy (benz)pyrimidine-2-thione ring, and N-oxy 3-alkyl or 3-aryl substituted-2-thioxo-1,2-dihydroquinazoline-4-(3H)-one rings.
Claim 6
Dependent Claim
21 words
The composition of claim 3 wherein said thiol is selected from the group consisting of 2-mercaptobenzothiazole, 6-ethoxy-2-mercaptobenzothiazole, 2-mercaptobenzothiazole, 2-mercaptobenzoxazole, and phenylmercaptotetrazole.
Claim 7
Dependent Claim
17 words
The composition of claim 4 wherein said compound which absorbs actinic radiation is a cyanine dye-borate complex.
Claim 8
Dependent Claim
55 words
A photosensitive material comprising a support having a layer of a photohardenable composition on the surface thereof, said photohardenable composition comprising free radical addition polymerizable or crosslinkable material and a photoinitiator composition, said photoinitiator composition including a compound which absorbs actinic radiation and directly or indirectly generates free radicals, and an O-acylthiohydroxamate or an N-alkoxypyridinethione.
Claim 9
Dependent Claim
55 words
A photosensitive material comprising a support having a layer of a photohardenable composition on the surface thereof, said photohardenable composition comprising free radical addition polymerizable or crosslinkable material and a photoinitiator composition, said photoinitiator composition including a compound which absorbs actinic radiation and directly or indirectly generates free radicals, and an O-acylthiohydroxamate or an N-alkoxypyridinethione.
Claim 10
Dependent Claim
105 words
The photosensitive material of claim 7 wherein said O-acylthiohydroxamate or N-alkoxypyridienthione is a compound of the formula (I): ##STR11## where T represents a straight chain, branched chain or cyclic alkyl group having 1 to 30 carbon atoms, or a group of the formula --OCR where R represents an alkyl group, A is a member selected from the group consisting of a direct bond, --S--, NR'CO-- and --NR'--; R' represents an alkyl group or an aryl group, and Z represents the atoms necessary to complete a saturated or unsaturated 5 or 6 membered heterocyclic ring which may be condensed with a mononuclear or polynuclear aromatic ring.
Claim 11
Dependent Claim
14 words
The photosensitive material of claim 8 wherein said photohardenable composition additionally contains a thiol.
Claim 12
Dependent Claim
22 words
The photosensitive material of claim 9 wherein said thiol is selected from the group consisting of 2-mercaptobenzothiazole, 6-ethoxy-2-mercaptobenzothiazole, 2-mercaptobenzothiazole, 2-mercaptobenzoxazole, and phenylmercaptotetrazole.
Claim 13
Dependent Claim
18 words
The photosensitive material of claim 10 wherein said compound which absorbs actinic radiation is a cyanine dye-borate complex.
Claim 14
Dependent Claim
55 words
The photosensitive material of claim 8 wherein A in combination with Z represents the atoms necessary to complete a ring selected from the group consisting of a substituted or unsubstituted N-oxy pyridine-2 thione ring, N-oxy (benz)thiazolin-2-thione ring, N-oxy (benz)imidazol-2-thione ring, N-oxy(benz)oxazolin-2-thione ring, N-oxy (benz)selenazolin-2-thione ring, N-oxy (benz)pyrimidine-2-thione ring, and N-oxy 3-alkyl or 3-aryl substituted-2-thioxo-1,2-dihydroquinazoline-4-(3H)-one rings.
Claim 15
Dependent Claim
16 words
The photosensitive material of claim 6 wherein said photohardenable composition is microencapsulated with a color former.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1993-09-03 | 1994-03-05 | 1994-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-09-03 | 1998-03-05 | 1998-09-04 | $3760.00 | Window Closed / Lapsed |
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