Patent US4560644A successfully refreshed from Google Patents.
US4560644A
Expired / Lapsed
US
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Heat-developable light-sensitive materials with shifted dyes
Assignee: Fujifilm Holdings Corp
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Filing: 1984-03-29
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Granted: 1985-12-24
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Expires: 2004-03-29
Abstract
Abstract A heat-developable light-sensitive material comprising a support having there on a light-sensitive silver halide, a binder and a dye releasing compound which is capable of reducing the light-sensitive silver halide and reacting with the light-sensitive silver halide by heating to release a dye, said dye releasing compound is changed so as to have shorter absorption wavelength. The heat-developable light-sensitive material has high sensitivity and can be developed without supplying water from the outside.
Inventors
- 👤 Hideki Naito
- 👤 Kozo Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:38
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/494; G03C1/498; G03C1/49836; G03C1/49845; G03C8/00; G03C8/40; G03C8/4013; G03C8/4033; G03C8/408
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
175 words
A heat-developable light-sensitive material comprising a support having thereon a light-sensitive silver halide, a binder and a dye releasing compound which is capable of reducing the light-sensitive silver halide and reacting with the light-sensitive silver halide by heating to release a dye; wherein said dye-releasing compound is changed so as to have shorter absorption wavelength than that of the dye at least until the light sensitive material is subjected to exposure; and wherein the light-sensitive material contains a compound represented by the general formula (A) in order to accelerate development and accelerate release of a dye, ##STR16## wherein A 1 , A 2 , A 3 and A 4 , which may be the same or different, each represents a hydrogen atom or a substituent selected from an alkyl group, a substituted alkyl group, a cycloalkyl group, an aralkyl group, an aryl group, a substituted aryl group and a heterocyclic group; and A 1 and A 2 or A 2 or A 3 and A 4 may combine with each other to form a ring.
Claim 2
Dependent Claim
175 words
A heat-developable light-sensitive material comprising a support having thereon a light-sensitive silver halide, a binder and a dye releasing compound which is capable of reducing the light-sensitive silver halide and reacting with the light-sensitive silver halide by heating to release a dye; wherein said dye-releasing compound is changed so as to have shorter absorption wavelength than that of the dye at least until the light sensitive material is subjected to exposure; and wherein the light-sensitive material contains a compound represented by the general formula (A) in order to accelerate development and accelerate release of a dye, ##STR16## wherein A 1 , A 2 , A 3 and A 4 , which may be the same or different, each represents a hydrogen atom or a substituent selected from an alkyl group, a substituted alkyl group, a cycloalkyl group, an aralkyl group, an aryl group, a substituted aryl group and a heterocyclic group; and A 1 and A 2 or A 2 or A 3 and A 4 may combine with each other to form a ring.
Claim 3
Dependent Claim
46 words
A heat-developable light-sensitive material as claimed in claim 1, wherein said dye-releasing compound is changed so as to have a shorter absorption wavelengths by protecting the electron donative group in the dye conjugated system in the dye-releasing substance to reduce electron donative ability of the group.
Claim 4
Dependent Claim
56 words
A heat-developable light-sensitive material as claimed in claim 2, wherein the electron donative group is protected by a group selected from the group consisting of an acryl group, a substituted carbamoyl group, an unsubstituted carbamoyl group, an alkylsulfonyl group, an arylsulfonyl group, ##STR17## (wherein R represents an alkyl group and an aryl group) and trialkylsilyl group.
Claim 5
Dependent Claim
35 words
A heat-developable light-sensitive material as claimed in claim 1, wherein said dye-releasing compound is changed so as to have shorter absorption wavelengths by converting the dye moiety in the dye-releasing compound to a reduction type.
Claim 6
Dependent Claim
30 words
A heat-developable light-sensitive material as claimed in claim 1, wherein said dye-releasing substance is incorporated in the material in an amount of 10 mg/m 2 to 15 g/m 2 .
Claim 7
Dependent Claim
20 words
A heat-developable light-sensitive material as claimed in claim 1, wherein the light-sensitive material contains an organic silver salt oxidizing agent.
Claim 8
Dependent Claim
34 words
A heat-developable light-sensitive material as claimed in claim 1, wherein the light-sensitive material contains a thermal solvent which is able to melt at a temperature of a heat treatment of the light sensitive material.
Claim 9
Dependent Claim
29 words
A heat-developable light-sensitive material as claimed in claim 1, wherein the light-sensitive material contains at least one of an amine and an amine precursor as a dye releasing activator.
Claim 10
Dependent Claim
42 words
A heat-developable light-sensitive material as claimed in claim 8, wherein said at least one of amine and an amine precursor is contained in an amount up to 50 wt% based on the amount of a dry layer coated of the light-sensitive material.
Claim 11
Dependent Claim
41 words
A heat-developable light-sensitive material as claimed in claim 1, wherein said compound represented by the general Formula (A) is incorporated in an amount of up to 20 wt% based on the amount of a dry layer coated on the light-sensitive material.
Claim 12
Dependent Claim
29 words
A heat-developable light-sensitive material as claimed in claim 10, wherein said compounds represented by the general Formula (A) is incorporated in a range of 0.1 wt% to 15 wt%.
Claim 13
Dependent Claim
93 words
A heat-developable light-sensitive material as claimed in claim 1, wherein said dye releasing compound is represented by the general formula (I); R.sub.a --SO.sub.2 --D--A--G (I) wherein R a represents a reducing group capable of being oxidized by the silver halide; and D represents an image forming dye moiety; A represents an electron donative group of which the electron donative property becomes higher than that of --A--G after releasing of G; G represents a protective group which decreases the electron donative property of A and which releases upon heating of the dye releasing compound.
Claim 14
Independent Claim
173 words
A method for forming an image, which comprises imagewise exposing and heating a heat-developable light-sensitive material comprising a support having thereon a light-sensitive silver halide, a binder and a dye releasing compound which is capable of reducing the light-sensitive silver halide and reacting with the light-sensitive silver halide by heating to release a dye; wherein said dye releasing compound is changed so as to have shorter absorption wavelengths; and wherein said light-sensitive material contains a compound represented by the general formula (A) in order to accelerate development and accelerate release of a dye, ##STR18## wherein A 1 , A 2 , A 3 , and A 4 , which may be the same or different, each represents a hydrogen atom or a substituent selected from an alkyl group, a substituted alkyl group, a cycloalkyl group, an aralkyl group, an aryl group, a substituted aryl group and a heterocyclic group; and A 1 and A 2 or A 2 or A 3 and A 4 may combine with each other to form a ring.
Claim 15
Independent Claim
173 words
A method for forming an image, which comprises imagewise exposing and heating a heat-developable light-sensitive material comprising a support having thereon a light-sensitive silver halide, a binder and a dye releasing compound which is capable of reducing the light-sensitive silver halide and reacting with the light-sensitive silver halide by heating to release a dye; wherein said dye releasing compound is changed so as to have shorter absorption wavelengths; and wherein said light-sensitive material contains a compound represented by the general formula (A) in order to accelerate development and accelerate release of a dye, ##STR18## wherein A 1 , A 2 , A 3 , and A 4 , which may be the same or different, each represents a hydrogen atom or a substituent selected from an alkyl group, a substituted alkyl group, a cycloalkyl group, an aralkyl group, an aryl group, a substituted aryl group and a heterocyclic group; and A 1 and A 2 or A 2 or A 3 and A 4 may combine with each other to form a ring.
Claim 16
Dependent Claim
51 words
A heat-developable light-sensitive material as claimed in claim 12, wherein A represents a group which provides --OH, --NHSO 2 R 1 , --NH 2 , --N(R 1 )R 1 ' or --NHR 1 after releasing G, wherein R 1 and R 1 ' each represent an alkyl or an aryl group.
Claim 17
Dependent Claim
39 words
A method as claimed in claim 13, wherein said compound represented by the general Formula (A) is incorporated in an amount of up to 20 wt% based on the amount of a dry layer coated on a light-sensitive material.
Claim 18
Dependent Claim
27 words
A method as claimed in claim 15, wherein said compound represented by the general formula (A) as incorporated in a range of 0.1 wt% to 15 wt%.
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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) | 1988-12-23 | 1989-06-24 | 1989-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-23 | 1993-06-24 | 1993-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-23 | 1997-06-24 | 1997-12-24 | $7700.00 | Window Closed / Lapsed |