US4021249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat developable light-sensitive material incorporating a substituted s-triazine-2,4,6-(1H, 3H, 5H)-trione reducing agent
Assignee: Fujifilm Holdings Corp
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Filing: 1975-09-12
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Granted: 1977-05-03
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Expires: 1995-09-12
Abstract
Abstract A heat developable light-sensitive material having reduced fog, increased whiteness, and stability to normal room illumination comprising a support having therein or in one or more layers thereon (a) an organic silver salt, (b) a light-sensitive silver halide or a component capable of forming a light-sensitive silver halide upon reaction with the organic silver salt (a), and (c) as a reducing agent an s-triazine-2,4,6-(1H, 3H, 5H)-trione substituted with a phenol derivative (having a substituted group in at least one of the o-positions thereof with respect to the hydroxyl group) in at least one of the 1-, 3- or 5-positions.
Inventors
- 👤 Yasuhiro Noguchi
- 👤 Toshinao Ukai
- 👤 Kenji Sashihara
- 👤 Takao Masuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:53
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/494; G03C1/498; G03C1/49827
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
86 words
A heat developable light-sensitive material comprising a support having therein or in one or more layers thereon (a) an organic silver salt, (b) a light-sensitive silver halide or a component capable of forming a light-sensitive silver halide by reaction with the organic silver salt, and (c) as a reducing agent an s-triazine-2,4,6-(1H, 3H, 5H)-trione substituted with a phenol derivative (having a substituted group in at least one ortho-position thereof with respect to the hydroxyl group thereof) in at least one of the 1-, 3- or 5-positions.
Claim 2
Dependent Claim
86 words
A heat developable light-sensitive material comprising a support having therein or in one or more layers thereon (a) an organic silver salt, (b) a light-sensitive silver halide or a component capable of forming a light-sensitive silver halide by reaction with the organic silver salt, and (c) as a reducing agent an s-triazine-2,4,6-(1H, 3H, 5H)-trione substituted with a phenol derivative (having a substituted group in at least one ortho-position thereof with respect to the hydroxyl group thereof) in at least one of the 1-, 3- or 5-positions.
Claim 3
Dependent Claim
118 words
The heat developable light-sensitive material of claim 1, wherein said reducing agent has the general formula (I) ##STR61## wherein R 1 , R 2 and R 3 each represents a hydrogen atom, and alkyl group having 1 to 16 carbons or a Q group, with at least one of R 1 , R 2 , and R 3 being a Q group; and the Q group being represented by the general formula (II) ##STR62## wherein R 4 represents an alkyl group having 1 to 20 carbons atoms, and R 5 represents a hydrogen atom or an alkyl group as described for R 1 , which alkyl group may be the same as or different from R 1 .
Claim 4
Dependent Claim
60 words
The heat developable light-sensitive material of claim 2, wherein the alkyl group for R 4 is a methyl, an ethyl group, a propyl group, an isopropyl group, a butyl group, a secondary butyl group, a tertiary butyl group, a 1,1-dimethylpropyl group, a hexyl group, an octyl group, a decyl group, a dodecyl group, a tetradecyl group, or a hexadecyl group.
Claim 5
Dependent Claim
22 words
The heat-developable light-sensitive material of claim 3, wherein R 4 is a tertiary butyl group, a dodecyl group, or a hexadecyl group.
Claim 6
Dependent Claim
15 words
The heat-developable light-sensitive material of claim 2, wherein said reducing agent is 1,3,5-tris-[3,5-Di-tert-butyl-4-hydroxybenzyl]-s-triazine-2,4,6-(1H, 3H, 5H)-trione.
Claim 7
Dependent Claim
34 words
The heat-developable light-sensitive material of claim 1, wherein said organic silver salt is a silver salt of an organic compound containing an imino group, a mercapto group, a thione group or a carboxyl group.
Claim 8
Dependent Claim
18 words
The heat-developable light-sensitive material of claim 6, wherein said organic silver a salt is an organic silver carboxylate.
Claim 9
Dependent Claim
23 words
The heat-developable light-sensitive material of claim 7, wherein said organic silver salt is a silver salt of an aliphatic long chain fatty acid.
Claim 10
Dependent Claim
26 words
The heat-developable light-sensitive material of claim 1, wherein said reducing agent comprises a mixture of said trione and another reducing agent as an assistant reducing agent.
Claim 11
Dependent Claim
144 words
The heat-developable light-sensitive material of claim 9, wherein said other reducing agent is a substituted phenol, an unsubstituted or substituted bisphenol, an unsubstituted or substituted bisnaphthol, a di- or polyhydroxybenzene, a di- or polyhydroxynaphthalene, a hydroquinone monoether, ascorbic acid or a derivative thereof, a 3-pyrazolidone, a pyrazolin-5-one, a reducing saccharide, a p-phenylenediamine or a derivative thereof, a reductone, kojic acid, hinokitiol, a hydroxylamine, a hydroxytetronic acid, a hydroxytetronamide, a hydroxyoxamic acid, a sulfohydrooxamic acid, a hydrazide, an indan-1,3-dione, a p-oxyphenylglycine, an ester of a carboxylic acid derived from a phenol having a bulky substituent in at least one orthoposition with a monohydric or polyhydric alcohol or phenol, or an ester of an alcohol derived from a phenol having a bulky substituent in at least one ortho-position or a phenol having a bulky substituent in at least one ortho-position with a mono- or polycarboxylic acid.
Claim 12
Dependent Claim
30 words
The heat-developable light-sensitive material of claim 1, wherein said reducing agent is present in an amount of about 0.1 mole to 10 mole per mole of said organic silver salt.
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) | 1980-05-02 | 1980-11-01 | 1981-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-02 | 1984-11-01 | 1985-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-02 | 1988-11-01 | 1989-05-03 | $7700.00 | Window Closed / Lapsed |