US4495273A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color photographic elements with improved mechanical properties
Assignee: Tulalip Consultoria Comercial SU
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Filing: 1981-09-03
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Granted: 1985-01-22
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Expires: 2001-09-03
Abstract
Abstract Silver halide photographic elements comprising a support on which there is spread a plurality of photosensitive layers of gelatin incorporating silver halides and containing coupling agents, and further being associatd with auxiliary gelatin layers tend to suffer from brittleness. An improved element comprises, spread over said support and under said plurality of photosensitive layers, a layer of gelatin in which there is dispersed a fragility reducing quantity of droplets of a water-immiscible high boiling organic solvent, and an adhesion promoting quantity of a vinyl addition polymer latex.
Inventors
- 👤 Mario Pannocchia
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:12
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/388; G03C1/00; G03C1/76; G03C1/91; G03C1/93; G03C7/392; G03C7/396; Y; Y10; Y10S; Y10S430/00; Y10S430/155
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
88 words
A silver halide photographic element comprising a support on which there is spread a plurality of silver halide photosensitive layers containing color photographic couplers, these layers being associated with auxiliary gelatin layers, and said element further comprising, spread over said support under said plurality of photosensitive layers, a layer of gelatin in which there is dispersed an effective amount of droplets of a water-immiscible high boiling organic solvent which reduces adhesion between the support and the photosensitive layers, and an effective amount of a vinyl addition polymer latex.
Claim 2
Dependent Claim
88 words
A silver halide photographic element comprising a support on which there is spread a plurality of silver halide photosensitive layers containing color photographic couplers, these layers being associated with auxiliary gelatin layers, and said element further comprising, spread over said support under said plurality of photosensitive layers, a layer of gelatin in which there is dispersed an effective amount of droplets of a water-immiscible high boiling organic solvent which reduces adhesion between the support and the photosensitive layers, and an effective amount of a vinyl addition polymer latex.
Claim 3
Dependent Claim
33 words
A photographic element as claimed in claim 1, wherein said organic solvent has a boiling point exceeding 200° C. and a water solubility of less than 0.5 g per liter at 25° C.
Claim 4
Dependent Claim
34 words
A photographic element as claimed in claim 2, wherein said organic solvent is chosen from the class consisting of dibutylphthalate, tricresylphosphate, triphenylphosphate, di-(2-ethylhexyl)-phthalate, di-n-octylphthalate, tri-(2-ethylhexyl)-phosphate, acetyltributylcitrate, di-(N-hexyl-)-adipate, di-(2-ethylhexyl)-adipate, dimethylsebacate, triethylenelycol-di-2-ethylhexoate, ethylphthalylethylglycolate, quinitol-bis-(2-ethylhexoate) and 1,4-cyclohexyl-dimethylene-bis-(2-ethylhexoate).
Claim 5
Dependent Claim
23 words
A photographic element as claimed in claim 1, wherein said vinyl addition polymer has a glass transition temperature of less than 25° C.
Claim 6
Dependent Claim
23 words
A photographic element as claimed in claim 3, wherein said vinyl addition polymer has a glass transition temperature of less than 25° C.
Claim 7
Dependent Claim
29 words
A photographic element as claimed in claim 1, wherein said vinyl addition polymers are chosen from the class consisting of polymethylacrylate, polyethylacrylate, polybutylacrylate, polyethoxyethylacrylate, polyhexylacrylate, polyethylhexylacrylate, polybutylmethacrylate and polyethoxyethylmethacrylate.
Claim 8
Dependent Claim
29 words
A photographic element as claimed in claim 3, wherein said vinyl addition polymers are chosen from the class consisting of polymethylacrylate, polyethylacrylate, polybutylacrylate, polyethoxyethylacrylate, polyhexylacrylate, polyethylhexylacrylate, polybutylmethacrylate and polyethoxyethylmethacrylate.
Claim 9
Dependent Claim
42 words
A photographic element as claimed in claim 1, wherein said organic solvent and/or vinyl addition polymer are in the proportions of at least 50% and at least 10% by weight respectively, with respect to the gelatin of said non-sensitive auxiliary gelatin layer.
Claim 10
Dependent Claim
42 words
A photographic element as claimed in claim 7, wherein said organic solvent and/or vinyl addition polymer are in the proportions of at least 50% and at least 10% by weight respectively, with respect to the gelatin of said non-sensitive auxiliary gelatin layer.
Claim 11
Dependent Claim
24 words
A photographic element as claimed in claims 1, 3, or 8, wherein said dispersed droplets have a size of between 0.1 and 1 micron.
Claim 12
Dependent Claim
24 words
A photographic element as claimed in claims 1, 3, or 8, wherein said latex particles have a size of between 0.03 and 0.4 microns.
Claim 13
Dependent Claim
18 words
A photographic element as claimed in claim 1, wherein said non-sensitive auxiliary gelatin layer is an anti-halo layer.
Claim 14
Dependent Claim
28 words
A photographic element as claimed in claims 1, 3, or 8, wherein said non-sensitive auxiliary gelatin layer has a thickness of between about 1 and about 10 microns.
Claim 15
Dependent Claim
79 words
A silver halide photographic element comprising a subbed support on which there is spread a plurality of silver halide photosensitive layers containing color photographic couplers, these layers being associated with auxiliary gelatin layers, and said element further comprising, spread over said subbed support under said plurality of photosensitive layers, a layer of gelatin in which there is dispersed an effective amount of droplets of a water-immiscible high boiling organic solvent, and an effective amount of vinyl addition polymer latex.
Claim 16
Dependent Claim
79 words
A silver halide photographic element comprising a subbed support on which there is spread a plurality of silver halide photosensitive layers containing color photographic couplers, these layers being associated with auxiliary gelatin layers, and said element further comprising, spread over said subbed support under said plurality of photosensitive layers, a layer of gelatin in which there is dispersed an effective amount of droplets of a water-immiscible high boiling organic solvent, and an effective amount of vinyl addition polymer latex.
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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) | 1988-01-22 | 1988-07-23 | 1989-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-22 | 1992-07-23 | 1993-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-22 | 1996-07-23 | 1997-01-22 | $7700.00 | Window Closed / Lapsed |