US4267267A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermally-developable light-sensitive elements
Assignee: Fujifilm Holdings Corp
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Filing: 1979-10-02
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Granted: 1981-05-12
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Expires: 1999-10-02
Abstract
Abstract A thermally developable light-sensitive element comprising a support having in one or more layers thereon at least (a0) an organic silver salt, (b) light-sensitive silver halide grains and (c) a reducing agent, wherein the average grain size of the light-sensitive silver halide grains is not less than about 0.05 μ and the support is gas permeable and, in addition, carries thereon a subbing layer composed of at least one copolymer selected from the group consisting of a vinyl chloride type copolymer in which vinyl chloride is present in the copolymer in an amount of about 50 molar % or higher and a vinylidene chloride type copolymer in which vinylidine chloride is present in the copolymer in an amount of about 50 molar % or higher. The thermally-developable light-sensitive element of the invention is highly sensitive and in addition, has a good storage stability retaining on storage the properties possessed by the "fresh" photosensitive element even under high humidity and/or high temperature conditions.
Inventors
- 👤 Shinpei Ikenoue
- 👤 Takao Masuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:20
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/494; G03C1/498; G03C1/49872; G03C1/76; G03C1/775; G03C1/79; Y; Y10; Y10S; Y10S430/00; Y10S430/162
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
228 words
In a thermally developable light-sensitive element comprising a support having in one or more layers thereon at least (a) an organic silver salt, (b) light-sensitive silver halide grains and (c) a reducing agent, the improvement wherein the average grain size of the light-sensitive silver halide grain is 0.05μ or larger, the support is a gas-permeable support and the support has thereon a subbing layer comprising at least one copolymer selected from the group consisting of a vinyl chloride copolymer in which vinyl chloride is present in the copolymer in an amount of 50 mol % to 98% and a vinylidene chloride copolymer in which vinylidene chloride is present in the copolymer in an amount of 50 mol % to 98 mole %, whereby the light-sensitive element shows reduced thermal fog with the passage of time, said vinyl chloride type copolymer or the vinylidene chloride type copolymer is selected from the group consisting of a copolymer of a vinyl ester and vinyl chloride, a copolymer of an acrylate and vinyl chloride, a copolymer of a maleate and vinyl chloride, a copolymer of a fumarate and vinyl chloride, a copolymer of acrylonitrile and vinyl chloride, a copolymer of a vinyl alkyl ether and vinyl chloride, a copolymer of vinyl chloride and vinylidene chloride, a copolymer of acrylonitrile and vinylidene chloride, or a copolymer of a vinyl ester and vinylidene chloride.
Claim 2
Dependent Claim
228 words
In a thermally developable light-sensitive element comprising a support having in one or more layers thereon at least (a) an organic silver salt, (b) light-sensitive silver halide grains and (c) a reducing agent, the improvement wherein the average grain size of the light-sensitive silver halide grain is 0.05μ or larger, the support is a gas-permeable support and the support has thereon a subbing layer comprising at least one copolymer selected from the group consisting of a vinyl chloride copolymer in which vinyl chloride is present in the copolymer in an amount of 50 mol % to 98% and a vinylidene chloride copolymer in which vinylidene chloride is present in the copolymer in an amount of 50 mol % to 98 mole %, whereby the light-sensitive element shows reduced thermal fog with the passage of time, said vinyl chloride type copolymer or the vinylidene chloride type copolymer is selected from the group consisting of a copolymer of a vinyl ester and vinyl chloride, a copolymer of an acrylate and vinyl chloride, a copolymer of a maleate and vinyl chloride, a copolymer of a fumarate and vinyl chloride, a copolymer of acrylonitrile and vinyl chloride, a copolymer of a vinyl alkyl ether and vinyl chloride, a copolymer of vinyl chloride and vinylidene chloride, a copolymer of acrylonitrile and vinylidene chloride, or a copolymer of a vinyl ester and vinylidene chloride.
Claim 3
Dependent Claim
37 words
The thermally developable light-sensitive element as claimed in claim 1, wherein the amount of the vinyl chloride or the vinylidene chloride to the other monomer(s) copolymerized therewith is in the range of 70 to 98 molar percent.
Claim 4
Dependent Claim
42 words
The thermally developable light-sensitive element as claimed in claim 1, wherein, the copolymer is a copolymer of vinylidene chloride and vinyl chloride and, the molar ratio of the vinylidene chloride to the vinyl chloride is in the range of 50:50 to 98:2.
Claim 5
Dependent Claim
31 words
The thermally developable light-sensitive element as claimed in claim 1, wherein the vinyl chloride type copolymer or the vinylidene chloride type copolymer has a polymerization degree of about 30 or greater.
Claim 6
Dependent Claim
31 words
The thermally developable light-sensitive element as claimed in claim 4, wherein the vinyl chloride type copolymer or the vinylidene chloride type copolymer has a polymerization degree of from 50 to 50,000.
Claim 7
Dependent Claim
31 words
The thermally developable light-sensitive element as claimed in claim 2, wherein the copolymer is a copolymer of vinyl acetate and vinyl chloride or a copolymer of vinyl chloride and vinylidene chloride.
Claim 8
Dependent Claim
32 words
The thermally developable light-sensitive element as claimed in claim 1, wherein the amount of the copolymer present ranges from about 0.1 g to about 10 g per square meter of the support.
Claim 9
Dependent Claim
30 words
The thermally developable light-sensitive element as claimed in claim 7, wherein the amount of the copolymer present ranges from 0.2 g to 3 g per square meter of the support.
Claim 10
Dependent Claim
34 words
The thermally developable light-sensitive element as claimed in claim 1, wherein the gas-permeable support is a paper support, a cloth support, an unglazed ceramic support or a porous synthetic high molecular weight sheet support.
Claim 11
Dependent Claim
22 words
The thermally developable light-sensitive element as claimed in claim 1, wherein said element includes an protective polymer layer as an uppermost layer.
Claim 12
Dependent Claim
62 words
The thermally developable light-sensitive element as claimed in claim 1, wherein said element comprises said gas-permeable support having thereon, in order, said subbing layer comprising said at least one copolymer selected from the group consisting of said vinyl chloride copolymer and said vinylidene chloride copolymer and a thermally developable light-sensitive layer containing said component (a), said component (b) and said component (c).
Claim 13
Dependent Claim
29 words
The thermally developable light-sensitive element as claimed in claim 11, wherein said element additionally includes, as an uppermost layer, a protective polymer layer on said thermally developable light-sensitive layer.
Claim 14
Dependent Claim
17 words
The thermally developable light-sensitive element as claimed in claim 9, wherein said support is a paper support.
Claim 15
Dependent Claim
47 words
The thermally developable light-sensitive element as claimed in claim 1, wherein said subbing layer further includes a polyvinyl acetal in combination with said at least one copolymer, whereby the light-sensitive element shows reduced undesirable spots of higher optical density than the image obtained or bubbles after development.
Claim 16
Dependent Claim
47 words
The thermally developable light-sensitive element as claimed in claim 1, wherein said subbing layer further includes a higher alcohol in combination with said at least one copolymer, whereby the light-sensitive element shows reduced undesirable spots of higher optical density than the image obtained or bubbles after development.
Claim 17
Dependent Claim
30 words
The thermally developable light-sensitive element as claimed in claim 15, wherein said higher alcohol is present in an amount of about 0.01 to about 1 g/m 2 of said support.
Claim 18
Dependent Claim
20 words
The thermally developable light-sensitive element as claimed in claim 1, wherein said copolymer comprises maleic acid as a third comonomer.
Claim 19
Dependent Claim
24 words
The thermally developable light-sensitive element as claimed in claim 1, wherein said copolymer is a copolymer of vinyl diethyl phosphono acetate and vinyl chloride.
Claim 20
Dependent Claim
22 words
The thermally developable light-sensitive element as claimed in claim 1, wherein said copolymer is a copolymer of vinyl butylsulfonate and vinyl chloride.
Claim 21
Dependent Claim
22 words
The thermally developable light-sensitive element as claimed in claim 1, wherein said copolymer is a copolymer of 2,3-epoxypropyl methacrylate and vinyl chloride.
Claim 22
Dependent Claim
23 words
The thermally developable light-sensitive element as claimed in claim 1, wherein said copolymer is a copolymer of allyl 2,3-epoxypropyl ether and vinyl chloride.
Claim 23
Dependent Claim
24 words
The thermally developable light-sensitive element as claimed in claim 1, wherein said copolymer is a copolymer of ethyl or methyl acrylate and vinylidene chloride.
Claim 24
Dependent Claim
48 words
The thermally developable light-sensitive element as claimed in claim 14, wherein said polyvinyl acetal has a polymerization degree of about 200 to about 1500 and an acetalization degree of about 55 to about 90 weight % and is produced utilizing an aldehyde having 2 to 5 carbon atoms.
Claim 25
Dependent Claim
51 words
The thermally developable light-sensitive element as claimed in claim 1, wherein said subbing layer further includes a polyvinyl acetal and a higher alcohol in combination with said at least one copolymer, whereby the light-sensitive element shows reduced undesirable spots of higher optical density than the image obtained or bubbles after development.
Claim 26
Dependent Claim
104 words
The thermally developable light-sensitive element as claimed in claim 24, wherein said polyvinyl acetal has a polymerization degree of about 200 to about 1500 and an acetalization degree of about 55 to about 90 weight %, and is produced utilizing an aldehyde having 2 to 5 carbon atoms and is utilized in an amount of about 1 to 100 parts by weight based on 100 parts by weight of said copolymer in said subbing layer, wherein said higher alcohol has a melting point above about 40° C. and is present in an amount of about 0.01 to about 1 g/m 2 of said support.
Claim 27
Dependent Claim
25 words
The thermally developable light-sensitive element as claimed in claim 1, wherein the average grain size of the light-sensitive silver halide grain is 0.05μ to 5μ.
Claim 28
Dependent Claim
30 words
The thermally developable light-sensitive element as claimed in claim 1, wherein the copolymer is a vinyl chloride type copolymer and is a copolymer of a vinyl ester and vinyl chloride.
Claim 29
Dependent Claim
28 words
The thermally developable light-sensitive element as claimed in claim 27, wherein the acid of said ester is a carboxylic acid and has from 1 to 22 carbon atoms.
Claim 30
Dependent Claim
16 words
The thermally developable light-sensitive element as claimed in claim 1, wherein said ester is vinyl acetate.
Claim 31
Dependent Claim
40 words
The thermally developable light-sensitive element as claimed in claim 14, wherein said polyvinyl acetal is utilized in an amount of about 1 to 100 parts by weight based on 100 parts by weight of said copolymer in said subbing layer.
Claim 32
Dependent Claim
22 words
The thermally developable light-sensitive element as claimed in claim 24, wherein said higher alcohol has a melting point above about 40° C.
References Cited (Backward Citations)
US4030930A
Cited
US4003749A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-05-11 | 1984-11-10 | 1985-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-11 | 1988-11-10 | 1989-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-11 | 1992-11-10 | 1993-05-12 | $7700.00 | Window Closed / Lapsed |