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Patent US4145221A successfully refreshed from Google Patents.
US4145221A
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Synthetic polymer latices in photographic silver halide emulsions containing multivalent metal salts
Assignee: BORGSATE NV
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Filing: 1977-11-08
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Granted: 1979-03-20
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Expires: 1997-11-08
Abstract
Abstract Physical and photographic characteristics of silver halide emulsions containing salts of multivalent metals are improved by adding synthetic water-insoluble terpolymers of acrylic esters, glycidyl acrylates and acrylamides as emulsion additives. The crosslinkable terpolymers are highly compatible with silver halide emulsions containing multivalent metal salts when an acrylamide is a polymer component at less than 15 wt% and an anionic sulfate surfactant of the formula ##STR1## where R 5 is a straight or branch-chain alkyl group of C 4 -C 12 , R 6 is a straight of branch-chain alkyl group of C 8 -C 20 , n is an integer of 8 to 40, and M + is an ammonium ion or, a monovalent metal ion such as potassium, sodium or cesium, is the dispersing agent during emulsion polymerization.
Inventors
- 👤 Jui-Chang Chuang
- 👤 Donald E. Trucker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:30
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/04; G03C1/043
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
61 words
Gelatino silver halide photographic emulsions containing salts of multivalent metal in which the gelatin is partially replaced by a terpolymer latex consisting of, by weight, 40-90% acrylates, 5-50% glycidyl acrylates and 1-20% acrylamides and where in the terpolymer latex contains an anionic sulfate-type surfactant in an amount, by weight, based on the weight of polymer solids of from 0.5 to 10%.
Claim 2
Dependent Claim
61 words
Gelatino silver halide photographic emulsions containing salts of multivalent metal in which the gelatin is partially replaced by a terpolymer latex consisting of, by weight, 40-90% acrylates, 5-50% glycidyl acrylates and 1-20% acrylamides and where in the terpolymer latex contains an anionic sulfate-type surfactant in an amount, by weight, based on the weight of polymer solids of from 0.5 to 10%.
Claim 3
Dependent Claim
20 words
Gelatino silver halide photographic emulsions of claim 1 wherein the gelatin to polymer latex ratios are from 20:80 to 95:5.
Claim 4
Dependent Claim
34 words
Gelatino silver halide photographic emulsions as set forth in claim 1 wherein the terpolymer latex contains an anionic sulfate-type surfactant, in an amount from 2 to 6% based on the weight of polymer solids.
Claim 5
Dependent Claim
119 words
Gelatino silver halide photographic emulsions as set forth in claim 1 wherein the acrylate portion of the terpolymer has the structure: ##STR6## wherein R 1 is hydrogen or methyl and R 2 is a straight- or branch-chain alkyl group having 1-8 carbon atoms, the glycidyl acrylate portion has the structure: ##STR7## where R 1 is hydrogen or methyl and the acrylamide portion has the structure: ##STR8## wherein R 1 is hydrogen or methyl, R 3 is hydrogen or a straight- or branch-chain alkyl group having 1-8 carbon atoms, R 4 is hydrogen, a straight or branch-chain alkyl group having 1-8 carbon atoms, an aryl group, a methylol group, an isobutoxymethyl group, a 1,1-dimethyl-3-oxybutyl group, or a hydroxymethylated 1,1-dimethyl-3-oxybutyl group.
Claim 6
Dependent Claim
35 words
Gelatino silver halide photographic emulsions as set forth in claim 4 wherein the latex particles range in average diameter from 0.01 to 1.0 mm and have a glass transition temperature of below about 20° C.
Claim 7
Dependent Claim
83 words
Gelatino silver halide photographic emulsions as set forth in claim 4 wherein the anionic sulfate-type dispersing agent for the polymer latex is an alkylphenoxypoly(oxyethylene)sulfate or an alkyloxypoly(oxyethylene)sulfate of the structures: ##STR9## wherein R 5 is a straight- or branched-chain alkyl group of 4-12 carbon atoms, R 6 is a straight- or branched-chain alkyl group of 8-20 carbon atoms, n is an integer of 8-40, M.sup.⊕ is an ammonium ion or a monovalent ion selected from the group consisting of sodium, potassium or cesium.
Claim 8
Dependent Claim
42 words
Gelatino silver halide photographic emulsions as set forth in claim 6 wherein the anionic sulphate-type dispersing agent for the polymer latex is selected from the group consisting of ammonium nonylphenoxypoly(oxyethylene) 9 sulfate and ammonium nonylphenoxypoly(oxyethylene) 30 sulfate, and ammonium dodecyloxypoly(oxyethylene) 11 sulfate.
Claim 9
Dependent Claim
74 words
A photographic element comprising a photographically acceptable support having on at least one surface thereof a gelatino silver halide photographic emulsion containing salts of multivalent metals in which the gelatin is partially replaced by a terpolymer consisting of, by weight, 40-90% acrylates, 5-50% glycidyl acrylates and 1-20% acrylamides and wherein the terpolymer latex contains an anionic sulfate-type surfactant in an amount, by weight, based on the weight of polymer solids from 0.5 to 10%.
Claim 10
Dependent Claim
74 words
A photographic element comprising a photographically acceptable support having on at least one surface thereof a gelatino silver halide photographic emulsion containing salts of multivalent metals in which the gelatin is partially replaced by a terpolymer consisting of, by weight, 40-90% acrylates, 5-50% glycidyl acrylates and 1-20% acrylamides and wherein the terpolymer latex contains an anionic sulfate-type surfactant in an amount, by weight, based on the weight of polymer solids from 0.5 to 10%.
Claim 11
Dependent Claim
21 words
A photographic element as set forth in claim 8 wherein the gelatin to terpolymer latex ratios are from 20:80 to 95:5.
Claim 12
Dependent Claim
33 words
A photographic element as set forth in claim 8 wherein the terpolymer latex contains an anionic sulfate-type surfactant in an amount of from 2-6% by weight based on the weight of polymer solids.
Claim 13
Dependent Claim
117 words
A photographic element as set forth in claim 8 wherein the acrylate portion of the terpolymer has the structure: ##STR10## wherein R 1 is hydrogen or methyl and R 2 is a straight or branch-chain alkyl group having 1-8 carbon atoms, the glycidyl acrylate portion has the structure: ##STR11## where R 1 is hydrogen or methyl and the acrylamide portion has the structure: ##STR12## wherein R 1 is hydrogen or methyl, R 3 is hydrogen or a straight- or branch-chain alkyl group having 1-8 carbon atoms, R 4 is hydrogen, a straight or branch-chain alkyl group having 1-8 carbon atoms, an aryl group, a methylol group, an isobutoxymethyl group, a 1,1-dimethyl-3-oxybutyl group, or a hydroxymethylated 1,1-dimethyl-3-oxybutyl group.
Claim 14
Dependent Claim
31 words
A photographic element as set forth in claim 10 wherein the latex particles range in diameter from 0.01 to 1.0 um, and having a glass transition temperature below about 20° C.
Claim 15
Dependent Claim
80 words
A photographic element as set forth in claim 11 wherein the anionic sulfate-type dispersing agent is an alkyl phenoxypoly(oxyethylene)sulfate or an alkyloxypoly(oxyethylene) sulfate of the structures: ##STR13## wherein R 5 is a straight or branch-chain alkyl group of 4-12 carbon atoms, R 6 is a straight- or branch-chain alkyl group of 8-20 carbon atoms, n is an integer of 8-40, and M.sup.⊕ is an ammonium ion or a monovalent ion selected from the group consisting of sodium, potassium or cesium.
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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) | 1982-03-19 | 1982-09-18 | 1983-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-19 | 1986-09-18 | 1987-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-19 | 1990-09-18 | 1991-03-20 | $7700.00 | Window Closed / Lapsed |