EP0911692A2 - Eléments photothermographiques - Google Patents
Eléments photothermographiques Download PDFInfo
- Publication number
- EP0911692A2 EP0911692A2 EP98119773A EP98119773A EP0911692A2 EP 0911692 A2 EP0911692 A2 EP 0911692A2 EP 98119773 A EP98119773 A EP 98119773A EP 98119773 A EP98119773 A EP 98119773A EP 0911692 A2 EP0911692 A2 EP 0911692A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- weight
- silver
- photothermographic
- polymer latex
- acid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- -1 silver halide Chemical class 0.000 claims abstract description 104
- 229920000642 polymer Polymers 0.000 claims abstract description 68
- 239000004332 silver Substances 0.000 claims abstract description 66
- 229910052709 silver Inorganic materials 0.000 claims abstract description 66
- 239000004816 latex Substances 0.000 claims abstract description 53
- 229920000126 latex Polymers 0.000 claims abstract description 53
- 239000011248 coating agent Substances 0.000 claims abstract description 50
- 238000000576 coating method Methods 0.000 claims abstract description 50
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 42
- 239000011230 binding agent Substances 0.000 claims abstract description 34
- 239000002253 acid Substances 0.000 claims abstract description 30
- 239000002904 solvent Substances 0.000 claims abstract description 15
- 238000001035 drying Methods 0.000 claims abstract description 9
- GGCZERPQGJTIQP-UHFFFAOYSA-N sodium;9,10-dioxoanthracene-2-sulfonic acid Chemical compound [Na+].C1=CC=C2C(=O)C3=CC(S(=O)(=O)O)=CC=C3C(=O)C2=C1 GGCZERPQGJTIQP-UHFFFAOYSA-N 0.000 claims description 44
- 239000003638 chemical reducing agent Substances 0.000 claims description 20
- 229920001577 copolymer Polymers 0.000 claims description 17
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims description 15
- 229920002126 Acrylic acid copolymer Polymers 0.000 claims description 12
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims description 12
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 10
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 claims description 9
- 229920005989 resin Polymers 0.000 claims description 9
- 239000011347 resin Substances 0.000 claims description 9
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims description 8
- 229910052799 carbon Inorganic materials 0.000 claims description 7
- 239000000178 monomer Substances 0.000 claims description 7
- LVHBHZANLOWSRM-UHFFFAOYSA-N methylenebutanedioic acid Natural products OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 claims description 6
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 claims description 5
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 claims description 5
- MYRTYDVEIRVNKP-UHFFFAOYSA-N 1,2-Divinylbenzene Chemical compound C=CC1=CC=CC=C1C=C MYRTYDVEIRVNKP-UHFFFAOYSA-N 0.000 claims description 4
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 4
- JAHNSTQSQJOJLO-UHFFFAOYSA-N 2-(3-fluorophenyl)-1h-imidazole Chemical compound FC1=CC=CC(C=2NC=CN=2)=C1 JAHNSTQSQJOJLO-UHFFFAOYSA-N 0.000 claims description 4
- OEPOKWHJYJXUGD-UHFFFAOYSA-N 2-(3-phenylmethoxyphenyl)-1,3-thiazole-4-carbaldehyde Chemical compound O=CC1=CSC(C=2C=C(OCC=3C=CC=CC=3)C=CC=2)=N1 OEPOKWHJYJXUGD-UHFFFAOYSA-N 0.000 claims description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 4
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 claims description 4
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 claims description 4
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 claims description 4
- 239000011976 maleic acid Substances 0.000 claims description 4
- 229920003048 styrene butadiene rubber Polymers 0.000 claims description 4
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 claims description 4
- GOXQRTZXKQZDDN-UHFFFAOYSA-N 2-Ethylhexyl acrylate Chemical compound CCCCC(CC)COC(=O)C=C GOXQRTZXKQZDDN-UHFFFAOYSA-N 0.000 claims description 3
- 239000002174 Styrene-butadiene Substances 0.000 claims description 3
- 239000011115 styrene butadiene Substances 0.000 claims description 3
- 229920000178 Acrylic resin Polymers 0.000 claims description 2
- 239000004925 Acrylic resin Substances 0.000 claims description 2
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 claims description 2
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims description 2
- 150000001732 carboxylic acid derivatives Chemical class 0.000 claims description 2
- 229920001225 polyester resin Polymers 0.000 claims description 2
- 239000004645 polyester resin Substances 0.000 claims description 2
- 229920005672 polyolefin resin Polymers 0.000 claims description 2
- 229920005749 polyurethane resin Polymers 0.000 claims description 2
- 238000007334 copolymerization reaction Methods 0.000 claims 1
- 239000010410 layer Substances 0.000 description 92
- 125000004432 carbon atom Chemical group C* 0.000 description 87
- 239000000975 dye Substances 0.000 description 80
- 239000000243 solution Substances 0.000 description 77
- 150000001875 compounds Chemical class 0.000 description 68
- 239000006185 dispersion Substances 0.000 description 54
- 238000000034 method Methods 0.000 description 45
- 239000002245 particle Substances 0.000 description 41
- 239000000839 emulsion Substances 0.000 description 37
- 239000003795 chemical substances by application Substances 0.000 description 28
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 23
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical group OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 22
- 150000003378 silver Chemical class 0.000 description 22
- 239000007787 solid Substances 0.000 description 21
- 108010010803 Gelatin Proteins 0.000 description 18
- 239000007864 aqueous solution Substances 0.000 description 18
- 229920000159 gelatin Polymers 0.000 description 18
- 239000008273 gelatin Substances 0.000 description 18
- 235000019322 gelatine Nutrition 0.000 description 18
- 235000011852 gelatine desserts Nutrition 0.000 description 18
- 230000001235 sensitizing effect Effects 0.000 description 18
- 125000003118 aryl group Chemical group 0.000 description 17
- 239000011241 protective layer Substances 0.000 description 17
- 239000000203 mixture Substances 0.000 description 16
- 239000000126 substance Substances 0.000 description 16
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 15
- 206010070834 Sensitisation Diseases 0.000 description 14
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 14
- 230000008313 sensitization Effects 0.000 description 14
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 12
- 238000002156 mixing Methods 0.000 description 12
- 239000003960 organic solvent Substances 0.000 description 12
- 125000001424 substituent group Chemical group 0.000 description 11
- 125000000217 alkyl group Chemical group 0.000 description 10
- 239000004848 polyfunctional curative Substances 0.000 description 10
- ANRHNWWPFJCPAZ-UHFFFAOYSA-M thionine Chemical compound [Cl-].C1=CC(N)=CC2=[S+]C3=CC(N)=CC=C3N=C21 ANRHNWWPFJCPAZ-UHFFFAOYSA-M 0.000 description 10
- 238000009826 distribution Methods 0.000 description 9
- 229910052751 metal Inorganic materials 0.000 description 9
- 239000002184 metal Substances 0.000 description 9
- 229920002451 polyvinyl alcohol Polymers 0.000 description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 8
- 239000004372 Polyvinyl alcohol Substances 0.000 description 8
- 150000007524 organic acids Chemical class 0.000 description 8
- 238000002360 preparation method Methods 0.000 description 8
- 150000003839 salts Chemical class 0.000 description 8
- 239000004576 sand Substances 0.000 description 8
- 230000035945 sensitivity Effects 0.000 description 8
- 230000003595 spectral effect Effects 0.000 description 8
- 238000002835 absorbance Methods 0.000 description 7
- 238000011161 development Methods 0.000 description 7
- 229910052736 halogen Inorganic materials 0.000 description 7
- 150000002367 halogens Chemical class 0.000 description 7
- DZVCFNFOPIZQKX-LTHRDKTGSA-M merocyanine Chemical compound [Na+].O=C1N(CCCC)C(=O)N(CCCC)C(=O)C1=C\C=C\C=C/1N(CCCS([O-])(=O)=O)C2=CC=CC=C2O\1 DZVCFNFOPIZQKX-LTHRDKTGSA-M 0.000 description 7
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 7
- 230000005070 ripening Effects 0.000 description 7
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 description 6
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 6
- 125000001931 aliphatic group Chemical group 0.000 description 6
- 125000003545 alkoxy group Chemical group 0.000 description 6
- 239000012153 distilled water Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Natural products C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 description 6
- 230000003287 optical effect Effects 0.000 description 6
- 150000002894 organic compounds Chemical class 0.000 description 6
- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid Chemical compound OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 description 6
- 239000000049 pigment Substances 0.000 description 6
- IOLCXVTUBQKXJR-UHFFFAOYSA-M potassium bromide Chemical compound [K+].[Br-] IOLCXVTUBQKXJR-UHFFFAOYSA-M 0.000 description 6
- 239000000843 powder Substances 0.000 description 6
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical compound [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 description 6
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 5
- 229920002472 Starch Polymers 0.000 description 5
- 125000004453 alkoxycarbonyl group Chemical group 0.000 description 5
- 150000001558 benzoic acid derivatives Chemical class 0.000 description 5
- 238000011033 desalting Methods 0.000 description 5
- 239000002270 dispersing agent Substances 0.000 description 5
- 239000010419 fine particle Substances 0.000 description 5
- 229920000728 polyester Polymers 0.000 description 5
- 239000002243 precursor Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- ZUNKMNLKJXRCDM-UHFFFAOYSA-N silver bromoiodide Chemical compound [Ag].IBr ZUNKMNLKJXRCDM-UHFFFAOYSA-N 0.000 description 5
- 239000002002 slurry Substances 0.000 description 5
- 239000008107 starch Substances 0.000 description 5
- 229910052714 tellurium Inorganic materials 0.000 description 5
- PORWMNRCUJJQNO-UHFFFAOYSA-N tellurium atom Chemical compound [Te] PORWMNRCUJJQNO-UHFFFAOYSA-N 0.000 description 5
- 229920002554 vinyl polymer Polymers 0.000 description 5
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical group S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 4
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 4
- 229920002153 Hydroxypropyl cellulose Polymers 0.000 description 4
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 4
- 239000004793 Polystyrene Substances 0.000 description 4
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 4
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 4
- 150000007933 aliphatic carboxylic acids Chemical class 0.000 description 4
- 150000001338 aliphatic hydrocarbons Chemical class 0.000 description 4
- 239000002585 base Substances 0.000 description 4
- 239000011324 bead Substances 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000000084 colloidal system Substances 0.000 description 4
- 150000004696 coordination complex Chemical class 0.000 description 4
- 125000004093 cyano group Chemical group *C#N 0.000 description 4
- 238000005189 flocculation Methods 0.000 description 4
- 230000016615 flocculation Effects 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 4
- 239000001863 hydroxypropyl cellulose Substances 0.000 description 4
- 235000010977 hydroxypropyl cellulose Nutrition 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- LFSXCDWNBUNEEM-UHFFFAOYSA-N phthalazine Chemical class C1=NN=CC2=CC=CC=C21 LFSXCDWNBUNEEM-UHFFFAOYSA-N 0.000 description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 229920006254 polymer film Polymers 0.000 description 4
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- 230000009467 reduction Effects 0.000 description 4
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- 235000019698 starch Nutrition 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- 239000004094 surface-active agent Substances 0.000 description 4
- 150000004772 tellurides Chemical class 0.000 description 4
- 238000011282 treatment Methods 0.000 description 4
- HNSDLXPSAYFUHK-UHFFFAOYSA-N 1,4-bis(2-ethylhexyl) sulfosuccinate Chemical compound CCCCC(CC)COC(=O)CC(S(O)(=O)=O)C(=O)OCC(CC)CCCC HNSDLXPSAYFUHK-UHFFFAOYSA-N 0.000 description 3
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- JKFYKCYQEWQPTM-UHFFFAOYSA-N 2-azaniumyl-2-(4-fluorophenyl)acetate Chemical compound OC(=O)C(N)C1=CC=C(F)C=C1 JKFYKCYQEWQPTM-UHFFFAOYSA-N 0.000 description 3
- NEAQRZUHTPSBBM-UHFFFAOYSA-N 2-hydroxy-3,3-dimethyl-7-nitro-4h-isoquinolin-1-one Chemical class C1=C([N+]([O-])=O)C=C2C(=O)N(O)C(C)(C)CC2=C1 NEAQRZUHTPSBBM-UHFFFAOYSA-N 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 3
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 3
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 3
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 description 3
- 229910021612 Silver iodide Inorganic materials 0.000 description 3
- FOIXSVOLVBLSDH-UHFFFAOYSA-N Silver ion Chemical compound [Ag+] FOIXSVOLVBLSDH-UHFFFAOYSA-N 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- QTBSBXVTEAMEQO-UHFFFAOYSA-N acetic acid Substances CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 125000002252 acyl group Chemical group 0.000 description 3
- 125000004442 acylamino group Chemical group 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- 125000004414 alkyl thio group Chemical group 0.000 description 3
- 229920006318 anionic polymer Polymers 0.000 description 3
- 125000004104 aryloxy group Chemical group 0.000 description 3
- 235000010323 ascorbic acid Nutrition 0.000 description 3
- 229960005070 ascorbic acid Drugs 0.000 description 3
- 239000011668 ascorbic acid Substances 0.000 description 3
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical compound OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 description 3
- XSCHRSMBECNVNS-UHFFFAOYSA-N benzopyrazine Chemical class N1=CC=NC2=CC=CC=C21 XSCHRSMBECNVNS-UHFFFAOYSA-N 0.000 description 3
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 3
- 239000001768 carboxy methyl cellulose Substances 0.000 description 3
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 3
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 3
- 229920002678 cellulose Polymers 0.000 description 3
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- 229910017052 cobalt Inorganic materials 0.000 description 3
- 239000010941 cobalt Substances 0.000 description 3
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 3
- 238000000402 conductometric titration Methods 0.000 description 3
- 238000003851 corona treatment Methods 0.000 description 3
- 239000003623 enhancer Substances 0.000 description 3
- 235000019441 ethanol Nutrition 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 125000005843 halogen group Chemical group 0.000 description 3
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- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 238000003384 imaging method Methods 0.000 description 3
- 230000000670 limiting effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- BQPIGGFYSBELGY-UHFFFAOYSA-N mercury(2+) Chemical class [Hg+2] BQPIGGFYSBELGY-UHFFFAOYSA-N 0.000 description 3
- 229910021645 metal ion Inorganic materials 0.000 description 3
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 3
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 3
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- 239000011591 potassium Substances 0.000 description 3
- 229910052700 potassium Inorganic materials 0.000 description 3
- NLKNQRATVPKPDG-UHFFFAOYSA-M potassium iodide Chemical compound [K+].[I-] NLKNQRATVPKPDG-UHFFFAOYSA-M 0.000 description 3
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- ADZWSOLPGZMUMY-UHFFFAOYSA-M silver bromide Chemical compound [Ag]Br ADZWSOLPGZMUMY-UHFFFAOYSA-M 0.000 description 3
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- 159000000000 sodium salts Chemical class 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 125000005504 styryl group Chemical group 0.000 description 3
- 150000003455 sulfinic acids Chemical class 0.000 description 3
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- 239000011593 sulfur Substances 0.000 description 3
- YXIWHUQXZSMYRE-UHFFFAOYSA-N 1,3-benzothiazole-2-thiol Chemical compound C1=CC=C2SC(S)=NC2=C1 YXIWHUQXZSMYRE-UHFFFAOYSA-N 0.000 description 2
- YHMYGUUIMTVXNW-UHFFFAOYSA-N 1,3-dihydrobenzimidazole-2-thione Chemical compound C1=CC=C2NC(S)=NC2=C1 YHMYGUUIMTVXNW-UHFFFAOYSA-N 0.000 description 2
- OXFSTTJBVAAALW-UHFFFAOYSA-N 1,3-dihydroimidazole-2-thione Chemical compound SC1=NC=CN1 OXFSTTJBVAAALW-UHFFFAOYSA-N 0.000 description 2
- ARXJGSRGQADJSQ-UHFFFAOYSA-N 1-methoxypropan-2-ol Chemical compound COCC(C)O ARXJGSRGQADJSQ-UHFFFAOYSA-N 0.000 description 2
- AFBBKYQYNPNMAT-UHFFFAOYSA-N 1h-1,2,4-triazol-1-ium-3-thiolate Chemical compound SC=1N=CNN=1 AFBBKYQYNPNMAT-UHFFFAOYSA-N 0.000 description 2
- AVRPFRMDMNDIDH-UHFFFAOYSA-N 1h-quinazolin-2-one Chemical compound C1=CC=CC2=NC(O)=NC=C21 AVRPFRMDMNDIDH-UHFFFAOYSA-N 0.000 description 2
- SULYEHHGGXARJS-UHFFFAOYSA-N 2',4'-dihydroxyacetophenone Chemical compound CC(=O)C1=CC=C(O)C=C1O SULYEHHGGXARJS-UHFFFAOYSA-N 0.000 description 2
- PAWQVTBBRAZDMG-UHFFFAOYSA-N 2-(3-bromo-2-fluorophenyl)acetic acid Chemical compound OC(=O)CC1=CC=CC(Br)=C1F PAWQVTBBRAZDMG-UHFFFAOYSA-N 0.000 description 2
- XNWFRZJHXBZDAG-UHFFFAOYSA-N 2-METHOXYETHANOL Chemical compound COCCO XNWFRZJHXBZDAG-UHFFFAOYSA-N 0.000 description 2
- RPWDFMGIRPZGTI-UHFFFAOYSA-N 2-[1-(2-hydroxy-3,5-dimethylphenyl)-3,5,5-trimethylhexyl]-4,6-dimethylphenol Chemical compound C=1C(C)=CC(C)=C(O)C=1C(CC(C)CC(C)(C)C)C1=CC(C)=CC(C)=C1O RPWDFMGIRPZGTI-UHFFFAOYSA-N 0.000 description 2
- FLFWJIBUZQARMD-UHFFFAOYSA-N 2-mercapto-1,3-benzoxazole Chemical compound C1=CC=C2OC(S)=NC2=C1 FLFWJIBUZQARMD-UHFFFAOYSA-N 0.000 description 2
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- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920003169 water-soluble polymer Polymers 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 239000001018 xanthene dye Substances 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
- QUEDXNHFTDJVIY-UHFFFAOYSA-N γ-tocopherol Chemical class OC1=C(C)C(C)=C2OC(CCCC(C)CCCC(C)CCCC(C)C)(C)CCC2=C1 QUEDXNHFTDJVIY-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
- G03C1/00—Photosensitive materials
- G03C1/494—Silver salt compositions other than silver halide emulsions; Photothermographic systems ; Thermographic systems using noble metal compounds
- G03C1/498—Photothermographic systems, e.g. dry silver
- G03C1/49836—Additives
- G03C1/49863—Inert additives, e.g. surfactants, binders
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
- G03C1/00—Photosensitive materials
- G03C1/005—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein
- G03C1/04—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein with macromolecular additives; with layer-forming substances
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
- G03C2200/00—Details
- G03C2200/36—Latex
Definitions
- This invention relates to photothermographic elements and more particularly, to photothermographic elements having improved photographic properties.
- Photothermographic technology is well known. In photothermographic elements having a photosensitive layer on a support, exposure is made to form latent images which are converted into visible images through heat development.
- the technology is disclosed, for example, in USP 3,152,904 and 3,457,075, D. Morgan and B. Shely, "Thermally Processed Silver Systems” in “Imaging Processes and Materials,” Neblette, 8th Ed., Sturge, V. Walworth and A. Shepp Ed., page 2, 1969.
- photothermographic layers are formed by applying coating solutions based on organic solvents followed by drying.
- organic solvents for example, USP 5,415,993 discloses a system of polyvinyl butyral as a binder in toluene and methyl ethyl ketone as a solvent.
- the use of organic solvents is undesirable from the ecological and safety standpoints.
- One countermeasure proposed thus far is a technique of forming photothermographic layers using aqueous solvents.
- several patents disclose to use polymers as the binder.
- JP-A 116114/1978 discloses gelatin
- JP-A 151138/1975 discloses polyvinyl alcohol
- JP-A 28737/1983 discloses polyvinyl acetal
- USP 4,504,575 and 4,529,689 disclose polymer latexes
- WO 97/04355 and WO 97/04356 disclose water-soluble polymers or water-dispersible polymers.
- An object of the invention is to provide a photothermographic element which has improved photographic properties and can be prepared by applying an aqueous solution which is desirable from the ecological and safety standpoints.
- a photothermographic element comprising at least one photothermographic layer containing a photosensitive silver halide and a binder on at least one surface of a support.
- the element further contains an organic silver salt, preferably a silver salt of an organic carboxylic acid, and a reducing agent therefor.
- the photothermographic layer has been formed by applying an aqueous coating solution, followed by drying.
- the binder containing at least 50% by weight of the binder of a polymer latex is dispersed in a solvent containing at least 30% by weight of the solvent of water.
- the polymer latex should have a surface acid content of 0.5% to 8% by weight, and preferably 1% to 4% by weight.
- the polymer latex has an equilibrium moisture content of 0.01% to 2% by weight at 25°C and RH 60%.
- FIG. 1 is a graph of conductometric titration curve used when a surface acid content is determined.
- the photothermographic element of the invention has at least one photothermographic layer (which is also referred to as photosensitive layer) on at least one surface of a support.
- the photosensitive layer contains a photosensitive silver halide and a binder.
- the element further contains an organic silver salt and a reducing agent therefor.
- the photosensitive layer may be a single layer or include two or more layers, preferably two to four layers.
- At least one of the photo-sensitive layers contains a polymer latex in an amount of at least 50% by weight, preferably 70% to 100% by weight of the entire binder in the layer.
- the polymer latex should have a surface acid content of 0.5% to 8% by weight. Except for this, no particular limits are imposed on the polymer latex. Use may be made of acrylic resins, vinyl acetate resins, polyester resins, polyurethane resins, rubbery resins, vinyl chloride resins, vinylidene chloride resins, polyolefin resins, and copolymers thereof.
- the photosensitive layer in the photothermographic element of the invention and the polymer latex contained therein are often referred to as “inventive photo-sensitive layer” and "inventive polymer latex,” respectively.
- the "polymer latex” is a dispersion of a microparticulate water-insoluble hydrophobic polymer in a water-soluble dispersing medium. With respect to the dispersed state, a polymer emulsified in a dispersing medium, an emulsion polymerized polymer, a micelle dispersion, and a polymer having a hydrophilic structure in a part of its molecule so that the molecular chain itself is dispersed on a molecular basis are included.
- dispersed particles should preferably have a mean particle size of about 1 to 50,000 nm, more preferably about 5 to 1,000 nm. No particular limit is imposed on the particle size distribution of dispersed particles, and the polymer latex may have either a wide particle size distribution or a monodisperse particle size distribution.
- the polymer latex used herein may be either a latex of the conventional uniform structure or a latex of the so-called core/shell type. In the latter case, better results are sometimes obtained when the core and the shell have different glass transition temperatures.
- the inventive polymer latex should preferably have a minimum film-forming temperature (MFT) of about -30°C to 90°C, more preferably about 0°C to 70°C.
- MFT minimum film-forming temperature
- a film-forming aid may be added in order to control the minimum film-forming temperature.
- the film-forming aid is also referred to as a plasticizer and includes organic compounds (typically organic solvents) for lowering the minimum film-forming temperature of a polymer latex. It is described in Muroi, "Chemistry of Synthetic Latex," Kobunshi Kankokai, 1970.
- the polymer of the inventive polymer latex should preferably have an equilibrium moisture content at 25°C and RH 60% of up to 2% by weight, more preferably 0.01% to 2% by weight, most preferably 0.1% to 1.5% by weight.
- equilibrium moisture content With respect to the definition and measurement of equilibrium moisture content, reference should be made to "Polymer Engineering Series No. 14, Polymer Material Test Methods," Edited by Japanese Polymer Society, Chijin Shokan Publishing K.K., for example.
- the polymer may be linear or branched or crosslinked.
- the polymer may be either a homopolymer or a copolymer having two or more monomers polymerized together.
- the copolymer may be either a random copolymer or a block copolymer.
- the polymer preferably has a number average molecule weight Mn of about 5,000 to about 1,000,000, more preferably about 10,000 to about 500,000. Polymers with a too lower molecular weight would generally provide a low film strength after coating whereas polymers with a too higher molecular weight are difficult to form films.
- Illustrative examples of the polymer latex which can be used as the binder in the photosensitive layer of the photothermographic element of the invention include latexes of methyl methacrylate/ethyl acrylate/(meth)acrylic acid copolymers, latexes of methyl methacrylate/2-ethylhexyl acrylate/styrene/(meth)acrylic acid copolymers, latexes of styrene/butadiene/(meth)acrylic acid copolymers, latexes of styrene/butadiene/itaconic acid copolymers, latexes of styrene/butadiene/divinyl benzene/(meth)acrylic acid copolymers, latexes of methyl methacrylate/vinyl chloride/(meth)acrylic acid copolymers, and latexes of vinylidene chloride/ethyl acrylate/
- polymers or polymer latexes are commercially available.
- Exemplary rubbery resins are LACSTAR 3307B and 7132C (Dai-Nippon Ink & Chemicals K.K.) and Nipol Lx416 (Nippon Zeon K.K.). These polymers may be used alone or in admixture of two or more.
- the polymer latex described above is used in an amount of at least 50% by weight of the entire binder.
- the styrenebutadiene polymer latex is used in an amount of 70 to 100% by weight of the entire binder in the photosensitive layer.
- the polymer latex used in the photosensitive layer of the photothermographic element of the invention should have a surface acid content of 0.5% to 8% by weight.
- the "surface acid content" of the polymer latex is the amount (expressed in percent) of carboxyl groups present on surfaces of latex particles based on the weight of polymer latex solids.
- the surface acid content of the polymer latex is 0.5% to 8% by weight, preferably 0.5% to 6% by weight, more preferably 1% to 4% by weight. Outside this range, higher surface acid contents can cause gelation whereas lower surface acid contents can give rise to the problems of a low sensitivity and low image density.
- a surface acid content of at least 0.5% by weight is preferably achieved by copolymerizing the polymer latex with a monomer having a carboxyl group such as acrylic acid, methacrylic acid, itaconic acid, and maleic acid. Also useful are commercially available monomers such as Aronix M5400 and M5500 (Toa Synthetic Chemistry K.K.) and B-CEA (Daicell Chemical Industry K.K.).
- the amount of carboxyl groups introduced into the polymer is preferably 0.5 to 20% by weight, more preferably 0.8 to 15% by weight of the polymer.
- the amount of acid on polymer latex surfaces can be determined by conventional conductometric titration. An illustrative procedure of titration will be described later in Example.
- a hydrophilic polymer may be added in an amount of less than 50% by weight, preferably less than 30% by weight of the entire binder.
- Such hydrophilic polymers are gelatin, polyvinyl alcohol, methyl cellulose, hydroxypropyl cellulose, carboxymethyl cellulose, and hydroxypropyl methyl cellulose.
- the total amount of binder is preferably 0.2 to 30 g/m 2 , more preferably 1 to 15 g/m 2 .
- the inventive photosensitive layer is formed by applying an aqueous coating solution followed by drying.
- aqueous it is meant that water accounts for at least 30% by weight of the solvent or dispersing medium of the coating solution. More preferably at least 50% by weight, most preferably 70 to 100% by weight of the solvent in the coating solution is water.
- the component other than water of the coating solution may be a water-miscible organic solvent such as methyl alcohol, ethyl alcohol, isopropyl alcohol, methyl cellosolve, ethyl cellosolve, dimethylformamide or ethyl acetate.
- Exemplary solvent compositions include a 90/10 mixture of water/methanol, a 70/30 mixture of water/methanol, a 90/10 mixture of water/ethanol, a 90/10 mixture of water/isopropanol, a 95/5 mixture of water/dimethylformamide, a 80/15/5 mixture of water/methanol/dimethylformamide, and a 90/5/5 mixture of water/methanol/dimethylformamide, all expressed in a weight ratio.
- a method for forming the photosensitive silver halide according to the invention is well known in the art. Any of the methods disclosed in Research Disclosure No. 17029 (June 1978) and USP 3,700,458, for example, may be used. Illustrative methods which can be used herein are a method of adding a halogen-containing compound to a pre-formed organic silver salt to convert a part of silver of the organic silver salt into photosensitive silver halide and a method of adding a silver-providing compound and a halogen-providing compound to a solution of gelatin or another polymer to form photosensitive silver halide grains and mixing the grains with an organic silver salt. The latter method is preferred in the practice of the invention.
- the photosensitive silver halide should preferably have a smaller grain size for the purpose of minimizing white turbidity after image formation.
- the grain size is up to 0.20 ⁇ m, preferably 0.01 ⁇ m to 0.15 ⁇ m, most preferably 0.02 ⁇ m to 0.12 ⁇ m.
- the term grain size designates the length of an edge of a silver halide grain where silver halide grains are regular grains of cubic or octahedral shape. Where silver halide grains are tabular, the grain size is the diameter of an equivalent circle having the same area as the projected area of a major surface of a tabular grain. Where silver halide grains are not regular, for example, in the case of spherical or rod-shaped grains, the grain size is the diameter of an equivalent sphere having the same volume as a grain.
- silver halide grains may be cubic, octahedral, tabular, spherical, rod-like and potato-like, with cubic and tabular grains being preferred in the practice of the invention.
- tabular silver halide grains they should preferably have an average aspect ratio of from 100:1 to 2:1, more preferably from 50:1 to 3:1.
- Silver halide grains having rounded corners are also preferably used. No particular limit is imposed on the face indices (Miller indices) of an outer surface of silver halide grains.
- silver halide grains Preferably silver halide grains have a high proportion of ⁇ 100 ⁇ face featuring high spectral sensitization efficiency upon adsorption of a spectral sensitizing dye.
- the proportion of ⁇ 100 ⁇ face is preferably at least 50%, more preferably at least 65%, most preferably at least 80%.
- the proportion of Miller index ⁇ 100 ⁇ face can be determined by the method described in T. Tani, J. Imaging Sci., 29, 165 (1985), utilizing the adsorption dependency of ⁇ 111 ⁇ face and ⁇ 100 ⁇ face upon adsorption of a sensitizing dye.
- the halogen composition of photosensitive silver halide is not critical and may be any of silver chloride, silver chlorobromide, silver bromide, silver iodobromide, silver iodochlorobromide, and silver iodide.
- Silver bromide or silver iodobromide is preferred in the practice of the invention.
- Most preferred is silver iodobromide preferably having a silver iodide content of 0.1 to 40 mol%, especially 0.1 to 20 mol%.
- the halogen composition in grains may have a uniform distribution or a non-uniform distribution wherein the halogen concentration changes in a stepped or continuous manner.
- silver iodobromide grains having a higher silver iodide content in the interior.
- Silver halide grains of the core/shell structure are also useful.
- Such core/shell grains preferably have a multilayer structure of 2 to 5 layers, more preferably 2 to 4 layers.
- the photosensitive silver halide grains used herein contain at least one complex of a metal selected from the group consisting of rhodium, rhenium, ruthenium, osmium, iridium, cobalt, mercury, and iron.
- the metal complexes may be used alone or in admixture of two or more complexes of a common metal or different metals.
- An appropriate content of the metal complex is 1x10 -9 to 1x10 -2 mol, more preferably 1x10 -8 to 1x10 -4 mol per mol of silver.
- Illustrative metal complex structures are those described in JP-A 225449/1995. Preferred among cobalt and iron complexes are hexacyano metal complexes.
- cobalt and iron complexes include hexacyano metal complexes such as complexes of ferrocyanate, ferricyanate, and hexacyanocobaltate ions.
- the distribution of the metal complex in silver halide grains is not critical. That is, the metal complex may be contained in silver halide grains uniformly or at a high concentration in either the core or the shell.
- Photosensitive silver halide grains may be desalted by any of well-known water washing methods such as noodle and flocculation methods although silver halide grains may be either desalted or not according to the invention.
- the photosensitive silver halide grains used herein should preferably be chemically sensitized.
- Preferred chemical sensitization methods are sulfur, selenium, and tellurium sensitization methods which are well known in the art. Also useful are a noble metal sensitization method using compounds of gold, platinum, palladium, and iridium and a reduction sensitization method.
- sulfur, selenium, and tellurium sensitization methods any of compounds well known for the purpose may be used.
- the compounds described in JP-A 128768/1995 are useful.
- the preferred compounds used in the noble metal sensitization method include chloroauric acid, potassium chloroaurate, potassium aurithiocyanate, gold sulfide, and gold selenide as well as the compounds described in USP 2,448,060 and BP 618,061.
- Illustrative examples of the compound used in the reduction sensitization method include ascorbic acid, thiourea dioxide, stannous chloride, aminoiminomethane-sulfinic acid, hydrazine derivatives, boran compounds, silane compounds, and polyamine compounds.
- Reduction sensitization may also be accomplished by ripening the emulsion while maintaining it at pH 7 or higher or at pAg 8.3 or lower. Reduction sensitization may also be accomplished by introducing a single addition portion of silver ion during grain formation.
- the photosensitive silver halide is preferably used in an amount of 0.01 to 0.5 mol, more preferably 0.02 to 0.3 mol, most preferably 0.03 to 0.25 mol per mol of the organic silver salt.
- any desired admixing method may be used insofar as the benefits of the invention are fully achievable.
- the photosensitive silver halide according to the invention is spectrally sensitized with a sensitizing dye.
- a sensitizing dye There may be used any of sensitizing dyes which can spectrally sensitize silver halide grains in the desired wavelength region when adsorbed to the silver halide grains.
- the sensitizing dyes used herein include cyanine dyes, merocyanine dyes, complex cyanine dyes, complex merocyanine dyes, holopolar cyanine dyes, styryl dyes, hemicyanine dyes, oxonol dyes, and hemioxonol dyes.
- sensitizing dyes which can be used herein are described in Research Disclosure, Item 17643 IV-A (December 1978, page 23), ibid ., Item 1831 X (March 1979, page 437) and the references cited therein. It is advantageous to select a sensitizing dye having appropriate spectral sensitivity to the spectral properties of a particular light source of various laser imagers, scanners, image setters and process cameras.
- Exemplary dyes for spectral sensitization to red light include compounds I-1 to I-38 described in JP-A 18726/1979, compounds I-1 to I-35 described in JP-A 75322/1994, compounds I-1 to I-34 described in JP-A 287338/1995, dyes 1 to 20 described in JP-B 39818/1980, compounds I-1 to I-37 described in JP-A 284343/1987, and compounds I-1 to I-34 described in JP-A 287338/1995 for red light sources such as He-Ne lasers, red semiconductor lasers and LED.
- red light sources such as He-Ne lasers, red semiconductor lasers and LED.
- spectral sensitization may be advantageously done with various known dyes including cyanine, merocyanine, styryl, hemicyanine, oxonol, hemioxonol, and xanthene dyes.
- Useful cyanine dyes are cyanine dyes having a basic nucleus such as a thiazoline, oxazoline, pyrroline, pyridine, oxazole, thiazole, selenazole and imidazole nucleus.
- Preferred examples of the useful merocyanine dye contain an acidic nucleus such as a thiohydantoin, rhodanine, oxazolidinedione, thiazolinedione, barbituric acid, thiazolinone, malononitrile, and pyrazolone nucleus in addition to the above-mentioned basic nucleus.
- an acidic nucleus such as a thiohydantoin, rhodanine, oxazolidinedione, thiazolinedione, barbituric acid, thiazolinone, malononitrile, and pyrazolone nucleus in addition to the above-mentioned basic nucleus.
- cyanine and merocyanine dyes those having an imino or carboxyl group are especially effective.
- a suitable choice may be made of well-known dyes as described, for example, in USP 3,761,279, 3,719,495, and 3,877,943, BP 1,466,201, 1,469,117, and 1,422,057, JP-B 10391/1991 and 52387/1994, JP-A 341432/1993, 194781/1994, and 301141/1994.
- cyanine dyes having a thioether bond-containing substituent group examples of which are the cyanine dyes described in JP-A 58239/1987, 138638/1991, 138642/1991, 255840/1992, 72659/1993, 72661/1993, 222491/1994, 230506/1990, 258757/1994, 317868/1994, and 324425/1994, Publication of International Patent Application No.
- dyes capable of forming the J-band as disclosed in USP 5,510,236, 3,871,887 (Example 5), JP-A 96131/1990 and 48753/1984.
- sensitizing dyes may be used alone or in admixture of two or more.
- a combination of sensitizing dyes is often used for the purpose of supersensitization.
- the emulsion may contain a dye which itself has no spectral sensitization function or a compound which does not substantially absorb visible light, but is capable of supersensitization.
- Useful sensitizing dyes, combinations of dyes showing supersensitization, and compounds showing supersensitization are described in Research Disclosure , Vol. 176, 17643 (December 1978), page 23, IV J and JP-B 25500/1974 and 4933/1968, JP-A 19032/1984 and 192242/1984.
- the sensitizing dye may be added to a silver halide emulsion by directly dispersing the dye in the emulsion or by dissolving the dye in a solvent and adding the solution to the emulsion.
- the solvent used herein includes water, methanol, ethanol, propanol, acetone, methyl cellosolve, 2,2,3,3-tetrafluoropropanol, 2,2,2-trifluoroethanol, 3-methoxy-1-propanol, 3 -methoxy-1-butanol, 1-methoxy-2-propanol, N,N-dimethylformamide and mixtures thereof.
- the time when the sensitizing dye is added to the silver halide emulsion according to the invention is at any step of an emulsion preparing process which has been ascertained effective.
- the sensitizing dye may be added to the emulsion at any stage or step before the emulsion is coated, for example, at a stage prior to the silver halide grain forming step and/or desalting step, during the desalting step and/or a stage from desalting to the start of chemical ripening as disclosed in USP 2,735,766, 3,628,960, 4,183,756, and 4,225,666, JP-A 184142/1983 and 196749/1985, and a stage immediately before or during chemical ripening and a stage from chemical ripening to emulsion coating as disclosed in JP-A 113920/1983.
- an identical compound may be added alone or in combination with a compound of different structure in divided portions, for example, in divided portions during a grain forming step and during a chemical ripening step or after the completion of chemical ripening, or before or during chemical ripening and after the completion thereof.
- the type of compound or the combination of compounds to be added in divided portions may be changed.
- the amount of the sensitizing dye used may be an appropriate amount complying with sensitivity and fog although the preferred amount is about 10 -6 , to 1 mol, more preferably 10 -4 to 10 -1 mol per mol of the silver halide in the photosensitive layer.
- the organic silver salt used herein is relatively stable to light, but forms a silver image when heated at 80°C or higher in the presence of an exposed photocatalyst (as typified by a latent image of photosensitive silver halide) and a reducing agent.
- the organic silver salt may be of any desired organic compound containing a source capable of reducing silver ion.
- Preferred are silver salts of organic acids, typically long chain aliphatic carboxylic acids having 10 to 30 carbon atoms, especially 15 to 28 carbon atoms.
- the silver-providing substance preferably constitutes about 5 to 70% by weight of the image forming layer.
- Preferred organic silver salts include silver salts of organic compounds having a carboxyl group. Examples include silver salts of aliphatic carboxylic acids and silver salts of aromatic carboxylic acids though not limited thereto. Preferred examples of the silver salt of aliphatic carboxylic acid include silver behenate, silver arachidate, silver stearate, silver oleate, silver laurate, silver caproate, silver myristate, silver palmitate, silver maleate, silver fumarate, silver tartrate, silver linolate, silver butyrate, silver camphorate and mixtures thereof.
- Silver salts of compounds having a mercapto or thion group and derivatives thereof are also useful.
- Preferred examples of these compounds include a silver salt of 3-mercapto-4-phenyl-1,2,4-triazole, a silver salt of 2-mercaptobenzimidazole, a silver salt of 2-mercapto-5-aminothiadiazole, a silver salt of 2-(ethylglycolamido)-benzothiazole, silver salts of thioglycolic acids such as silver salts of S-alkylthioglycolic acids wherein the alkyl group has 12 to 22 carbon atoms, silver salts of dithiocarboxylic acids such as a silver salt of dithioacetic acid, silver salts of thioamides, a silver salt of 5-carboxyl-1-methyl-2-phenyl-4-thiopyridine, silver salts of mercaptotriazines, a silver salt of 2-mercaptobenzoxazole as well as silver salt
- Compounds containing an imino group may also be used.
- Preferred examples of these compounds include silver salts of benzotriazole and derivatives thereof, for example, silver salts of benzotriazoles such as silver methyl-benzotriazole, silver salts of halogenated benzotriazoles such as silver 5-chlorobenzotriazole as well as silver salts of 1,2,4-triazole and 1-H-tetrazole and silver salts of imidazole and imidazole derivatives as described in USP 4,220,709. Also useful are various silver acetylide compounds as described, for example, in USP 4,761,361 and 4,775,613.
- the organic silver salt which can be used herein may take any desired shape although needle crystals having a minor axis and a major axis are preferred.
- grains should preferably have a minor axis of 0.01 ⁇ m to 0.20 ⁇ m and a major axis of 0.10 ⁇ m to 5.0 ⁇ m, more preferably a minor axis of 0.01 ⁇ m to 0.15 ⁇ m and a major axis of 0.10 ⁇ m to 4.0 ⁇ m.
- the grain size distribution of the organic silver salt is desirably monodisperse.
- the monodisperse distribution means that a standard deviation of the length of minor and major axes divided by the length, respectively, expressed in percent, is preferably up to 100%, more preferably up to 80%, most preferably up to 50%. It can be determined from the measurement of the shape of organic silver salt grains using an image obtained through a transmission electron microscope. Another method for determining a monodisperse distribution is to determine a standard deviation of a volume weighed mean diameter. The standard deviation divided by the volume weighed mean diameter, expressed in percent, which is a coefficient of variation, is preferably up to 100%, more preferably up to 80%, most preferably up to 50%.
- It may be determined by irradiating laser light, for example, to organic silver salt grains dispersed in liquid and determining the autocorrelation function of the fluctuation of scattering light relative to a time change, and obtaining the grain size (volume weighed mean diameter) therefrom.
- the organic silver salt used herein is preferably desalted.
- the desalting method is not critical. Any well-known method may be used although well-known filtration methods such as centrifugation, suction filtration, ultrafiltration, and flocculation/water washing are preferred.
- the organic silver salt is prepared into a solid particle dispersion using a dispersant, in order to provide fine particles of small size and free of flocculation.
- a solid particle dispersion of the organic silver salt may be prepared by mechanically dispersing the salt in the presence of dispersing aids by well-known comminuting means such as ball mills, vibrating ball mills, planetary ball mills, sand mills, colloidal mills, jet mills, roller mills, microfluidizers, nanomizers and Gaulin homogenizers. Of these, microfluidizers, nanomizers and Gaulin homogenizers are preferably used.
- the dispersant used in the preparation of a solid microparticulate dispersion of the organic silver salt may be selected from synthetic anionic polymers such as polyacrylic acid, copolymers of acrylic acid, copolymers of maleic acid, copolymers of maleic acid monoester, and copolymers of acryloylmethylpropanesulfonic acid; semi-synthetic anionic polymers such as carboxymethyl starch and carboxymethyl cellulose; anionic polymers such as alginic acid and pectic acid; anionic surfactants as described in JP-A 92716/1977 and WO 88/04794; the compounds described in Japanese Patent Application No.
- synthetic anionic polymers such as polyacrylic acid, copolymers of acrylic acid, copolymers of maleic acid, copolymers of maleic acid monoester, and copolymers of acryloylmethylpropanesulfonic acid
- semi-synthetic anionic polymers such as carboxymethyl starch and carboxymethyl cellulose
- the dispersant is mixed with the organic silver salt in powder or wet cake form prior to dispersion.
- the resulting slurry is fed into a dispersing machine.
- a mixture of the dispersant with the organic silver salt is subject to heat treatment or solvent treatment to form a dispersant-bearing powder or wet cake of the organic silver salt. It is acceptable to effect pH control with a suitable pH adjusting agent before, during or after dispersion.
- fine particles can be formed by roughly dispersing the organic silver salt in a solvent through pH control and thereafter, changing the pH in the presence of dispersing aids.
- An organic solvent can be used as the solvent for rough dispersion although the organic solvent is usually removed at the end of formation of fine particles.
- the thus prepared dispersion may be stored while continuously stirring for the purpose of preventing fine particles from settling during storage.
- the dispersion is stored after adding hydrophilic colloid to establish a highly viscous state (for example, in a jelly-like state using gelatin).
- An antiseptic agent may be added to the dispersion in order to prevent the growth of bacteria during storage.
- the organic silver salt is used in any desired amount, preferably about 0.1 to 5 g/m 2 , more preferably about 1 to 3 g/m 2 , as expressed by a silver coverage per square meter of the photothermographic element.
- the photothermographic element of the invention contains a reducing agent for the organic silver salt.
- the reducing agent for the organic silver salt may be any of substances, preferably organic substances, that reduce silver ion into metallic silver. Conventional photographic developing agents such as Phenidone®, hydroquinone and catechol are useful although hindered phenols are preferred reducing agents.
- the reducing agent should preferably be contained in an amount of 5 to 50 mol%, more preferably 10 to 40 mol% per mol of silver on the image forming layer-bearing side.
- the reducing agent may take the form of a precursor which is modified so as to exert its effective function only at the time of development.
- exemplary reducing agents include amidoximes such as phenylamidoxime, 2-thienylamidoxime, and p-phenoxyphenyl-amidoxime; azines such as 4-hydroxy-3,5-dimethoxy-benzaldehydeazine; combinations of aliphatic carboxylic acid arylhydrazides with ascorbic acid such as a combination of 2,2-bis(hydroxymethyl)propionyl- ⁇ -phenylhydrazine with ascorbic acid; combinations of polyhydroxybenzenes with hydroxylamine, reductone and/or hydrazine, such as combinations of hydroquinone with bis(ethoxyethyl)hydroxylamine, piperidinohexosereductone or formyl-4-methylphenyl-hydrazine; hydroxamic acids such as phenylhydroxamic acid, p-hydroxyphenylhydroxamic acid, and ⁇ -anilinehydroxamic acid; combinations
- amidoximes such as pheny
- the reducing agent may be added in any desired form such as solution, powder or solid particle dispersion.
- the solid particle dispersion of the reducing agent may be prepared by well-known comminuting means such as ball mills, vibrating ball mills, sand mills, colloidal mills, jet mills, roller mills, microfluidizers, nanomizers and Gaulin homogenizers. Dispersing aids may be used for facilitating dispersion.
- a higher optical density is sometimes achieved when an additive known as a "toner" for improving images is contained.
- the toner is also sometimes advantageous in forming black silver images.
- the toner is preferably used in an amount of 0.1 to 50 mol%, especially 0.5 to 20 mol% per mol of silver on the image forming layer-bearing side.
- the toner may take the form of a precursor which is modified so as to exert its effective function only at the time of development.
- toners for photothermographic elements using organic silver salts, a wide range of toners are disclosed, for example, in JP-A 6077/1971, 10282/1972, 5019/1974, 5020/1974, 91215/1974, 2524/1975, 32927/1975, 67132/1975, 67641/1975, 114217/1975, 3223/1976, 27923/1976, 14788/1977, 99813/1977, 1020/1978, 76020/1978, 156524/1979, 156525/1979, 183642/1986, and 56848/1992, JP-B 10727/1974 and 20333/1979, USP 3,080,254, 3,446,648, 3,782,941, 4,123,282, 4,510,236, BP 1,380,795, and Belgian Patent No.
- toner examples include phthalimide and N-hydroxyphthalimide; cyclic imides such as succinimide, pyrazolin-5-one, quinazolinone, 3-phenyl-2-pyrazolin-5-one, 1-phenylurazol, quinazoline and 2,4-thiazolidinedione; naphthalimides such as N-hydroxy-1,8-naphthalimide; cobalt complexes such as cobaltic hexamine trifluoroacetate; mercaptans as exemplified by 3-mercapto-1,2,4-triazole, 2,4-dimercaptopyrimidine, 3-mercapto-4,5-diphenyl-1,2,4-triazole, and 2,5-dimercapto-1,3,4-thiadiazole; N-(aminomethyl)aryldicarboxyimides such as (N,N-dimethylaminomethyl)phthalimide and N,N-(dimethylaminomethyl)
- the toner may be added in any desired form, for example, as a solution, powder and solid particle dispersion.
- the solid particle dispersion of the toner is prepared by well-known finely dividing means such as ball mills, vibrating ball mills, sand mills, colloid mills, jet mills, and roller mills. Dispersing aids may be used in preparing the solid particle dispersion.
- antifoggants, stabilizers and stabilizer precursors the silver halide emulsion and/or organic silver salt according to the invention can be further protected against formation of additional fog and stabilized against lowering of sensitivity during shelf storage.
- Suitable antifoggants, stabilizers and stabilizer precursors which can be used alone or in combination include thiazonium salts as described in USP 2,131,038 and 2,694,716, azaindenes as described in USP 2,886,437 and 2,444,605, mercury salts as described in USP 2,728,663, urazoles as described in USP 3,287,135, sulfocatechols as described in USP 3,235,652, oximes, nitrons and nitroindazoles as described in BP 623,448, polyvalent metal salts as described in USP 2,839,405, thiuronium salts as described in USP 3,220,839, palladium, platinum and gold salts as described in USP 2,566,263 and 2,
- Preferred antifoggants are organic halides, for example, the compounds described in JP-A 119624/1975, 120328/1975, 121332/1976, 58022/1979, 70543/1981, 99335/1981, 90842/1984, 129642/1986, 129845/1987, 208191/1994, 5621/1995, 2781/1995, 15809/1996, USP 5,340,712, 5,369,000, and 5,464,737.
- the antifoggant may be added in any desired form such as solution, powder or solid particle dispersion.
- the solid particle dispersion of the antifoggant may be prepared by well-known comminuting means such as ball mills, vibrating ball mills, sand mills, colloidal mills, jet mills, and roller mills. Dispersing aids may be used for facilitating dispersion.
- mercury (II) salt it is sometimes advantageous to add a mercury (II) salt to an emulsion layer as an antifoggant though not necessary in the practice of the invention.
- Mercury (II) salts preferred to this end are mercury acetate and mercury bromide.
- the mercury (II) salt is preferably added in an amount of 1x10 -9 mol to 1x10 -3 mol, more preferably 1x10 -8 mol to 1x10 -4 mol per mol of silver coated.
- the photothermographic element of the invention may contain a benzoic acid type compound for the purposes of increasing sensitivity and restraining fog.
- a benzoic acid type compound for the purposes of increasing sensitivity and restraining fog.
- Any of benzoic acid type compounds may be used although examples of the preferred structure are described in USP 4,784,939 and 4,152,160, Japanese Patent Application Nos. 98051/1996, 151241/1996, and 151242/1996.
- the benzoic acid type compound may be added to any site in the photothermographic element, preferably to a layer on the same side as the photosensitive layer, and more preferably an organic silver salt-containing layer.
- the benzoic acid type compound may be added at any step in the preparation of a coating solution.
- an organic silver salt-containing layer it may be added at any step from the preparation of the organic silver salt to the preparation of a coating solution, preferably after the preparation of the organic silver salt and immediately before coating.
- the benzoic acid type compound may be added in any desired form including powder, solution and fine particle dispersion. Alternatively, it may be added in a solution form after mixing it with other additives such as a sensitizing dye, reducing agent and toner.
- the benzoic acid type compound may be added in any desired amount, preferably 1x10 -6 mol to 2 mol, more preferably 1x10 -3 mol to 0.5 mol per mol of silver.
- mercapto, disulfide and thion compounds may be added for the purposes of retarding or accelerating development to control development, improving spectral sensitization efficiency, and improving storage stability before and after development.
- any structure is acceptable.
- Preferred are structures represented by Ar-S-M and Ar-S-S-Ar wherein M is a hydrogen atom or alkali metal atom, and Ar is an aromatic ring or fused aromatic ring having at least one nitrogen, sulfur, oxygen, selenium or tellurium atom.
- Preferred hetero-aromatic rings are benzimidazole, naphthimidazole, benzothiazole, naphthothiazole, benzoxazole, naphthoxazole, benzoselenazole, benzotellurazole, imidazole, oxazole, pyrrazole, triazole, thiadiazole, tetrazole, triazine, pyrimidine, pyridazine pyrazine, pyridine, purine, quinoline and quinazolinone rings.
- hetero-aromatic rings may have a substituent selected from the group consisting of halogen (e.g., Br and Cl), hydroxy, amino, carboxy, alkyl groups (having at least 1 carbon atom, preferably 1 to 4 carbon atoms), and alkoxy groups (having at least 1 carbon atom, preferably 1 to 4 carbon atoms).
- halogen e.g., Br and Cl
- hydroxy, amino, carboxy e.g., hydroxy, amino, carboxy, alkyl groups (having at least 1 carbon atom, preferably 1 to 4 carbon atoms), and alkoxy groups (having at least 1 carbon atom, preferably 1 to 4 carbon atoms).
- mercapto-substituted hetero-aromatic compound examples include 2-mercaptobenzimidazole, 2-mercaptobenzoxazole, 2-mercaptobenzothiazole, 2-mercapto-5-methylbenzimidazole, 6-ethoxy-2-mercaptobenzothiazole, 2,2'-dithiobis(benzothiazole), 3-mercapto-1,2,4-triazole, 4,5-diphenyl-2-imidazolethiol, 2-mercaptoimidazole, 1-ethyl-2-mercaptobenzimidazole, 2-mercaptoquinoline, 8-mercaptopurine, 2-mercapto-4(3H)-quinazolinone, 7-trifluoromethyl-4-quinolinethiol, 2,3,5,6-tetrachloro-4-pyridinethiol, 4-amino-6-hydroxy-2-mercapto-pyrimidine monohydrate, 2-amino-5-mercapto-1,3,4-diphenyl-2-imid
- These mercapto compounds are preferably added to the emulsion layer in amounts of 0.001 to 1.0 mol, more preferably 0.01 to 0.3 mol per mol of silver.
- a compound of the following general formula (1) or (2) is used for minimizing changes of photographic properties under varying development conditions.
- R 1 , R 2 , and R 3 are independently hydrogen, aliphatic hydrocarbon groups or aryl groups.
- the aliphatic hydrocarbon groups represented by R 1 in formula (1) include normal, branched or cyclic alkyl groups (preferably of 1 to 20 carbon atoms, more preferably 3 to 16 carbon atoms, most preferably 5 to 12 carbon atoms), alkenyl groups (preferably of 2 to 20 carbon atoms, more preferably 2 to 16 carbon atoms, most preferably 2 to 12 carbon atoms), and alkynyl groups (preferably of 2 to 20 carbon atoms, more preferably 2 to 16 carbon atoms, most preferably 2 to 12 carbon atoms), which may have substituents.
- alkyl groups preferably of 1 to 20 carbon atoms, more preferably 3 to 16 carbon atoms, most preferably 5 to 12 carbon atoms
- alkenyl groups preferably of 2 to 20 carbon atoms, more preferably 2 to 16 carbon atoms, most preferably 2 to 12 carbon atoms
- alkynyl groups preferably of 2 to 20 carbon atoms, more preferably 2 to 16 carbon atoms,
- substituents include aryl groups (preferably of 6 to 30 carbon atoms, more preferably 6 to 20 carbon atoms, most preferably 6 to 12 carbon atoms, such as phenyl, p-methylphenyl, and naphthyl), amino groups (preferably of 0 to 20 carbon atoms, more preferably 0 to 10 carbon atoms, most preferably 0 to 6 carbon atoms, such as amino, methylamino, dimethylamino, diethylamino, and dibenzylamino), alkoxy groups (preferably of 1 to 20 carbon atoms, more preferably 1 to 12 carbon atoms, most preferably 1 to 8 carbon atoms, such as methoxy, ethoxy, butoxy, and dodecyloxy), aryloxy groups (preferably of 6 to 20 carbon atoms, more preferably 6 to 16 carbon atoms, most preferably 6 to 12 carbon atoms, such as phenyloxy and 2-naphthyloxy), acyl groups (
- Preferred substituents on the aliphatic hydrocarbon groups represented by R 1 are aryl, alkoxy, heterocyclic cyano, alkoxycarbonyl groups and halogen atoms. Cyano, alkoxycarbonyl, alkoxy groups and halogen atoms are more preferred.
- the aryl groups represented by R 1 are preferably monocyclic or fused ring aryl groups having 6 to 30 carbon atoms, more preferably monocyclic or fused ring aryl groups having 6 to 20 carbon atoms, for example, phenyl and naphthyl, with the phenyl being especially preferred.
- the aryl groups represented by R 1 may have substituents thereon.
- substituents include those described above as the substituents on the aliphatic hydrocarbon groups represented by R 1 as well as alkyl groups (preferably of 1 to 20 carbon atoms, more preferably 1 to 12 carbon atoms, most preferably 1 to 8 carbon atoms, such as methyl, ethyl, isopropyl, tert-butyl, n-octyl, tert-amyl, dodecyl, and cyclohexyl), alkenyl groups (preferably of 2 to 20 carbon atoms, more preferably 2 to 12 carbon atoms, most preferably 2 to 8 carbon atoms, such as vinyl, allyl, 2-butenyl, and 3-pentenyl), and alkynyl groups (preferably of 2 to 20 carbon atoms, more preferably 2 to 12 carbon atoms, most preferably 2 to 8 carbon atoms, such as propargyl and 3-pentynyl).
- alkyl groups preferably of 1 to 20 carbon atoms, more
- Preferred substituents on the aryl groups represented by R 1 are alkyl, aryl, alkoxy, aryloxy, acyl, alkoxycarbonyl, acyloxy, acylamino, alkoxycarbonylamino, aryloxycarbonyl-amino, sulfonylamino, sulfamoylamino, carbamoylamino, ureido, alkylthio, arylthio, sulfonyl, nitro, sulfonylthio, halogen, and cyano.
- alkyl, alkoxy, aryloxy, acyl, alkoxycarbonyl, nitro, acylamino, alkylthio, halogen and cyano are more preferred.
- the groups represented by R 1 are preferably alkyl groups, and more preferably normal alkyl groups.
- R 2 The aliphatic hydrocarbon and aryl groups represented by R 2 in formula (1) are as defined above for R 1 , with their illustrative examples being also the same. Most preferably, R 2 is phenyl.
- R 3 in formula (1) The aliphatic hydrocarbon and aryl groups represented by R 3 in formula (1) are as defined above for R 1 , with their illustrative examples being also the same. Most preferably, R 3 represents alkyl (such as butyl) and phenyl.
- R 4 and R 5 are independently hydrogen, aliphatic hydrocarbon groups or aryl groups, R 6 and R 7 are independently aliphatic hydrocarbon groups or aryl groups.
- R 4 and R 5 in formula (2) are as defined above for R 1 in formula (1), with their illustrative examples being also the same.
- R 4 and R 5 are hydrogen, alkyl (such as methyl, ethyl and butyl) and phenyl.
- R 6 and R 7 in formula (2) are as defined above for R 1 in formula (1), with their illustrative examples being also the same. Most preferably, R 6 and R 7 are alkyl (such as methyl, butyl and hexyl) and phenyl.
- the compounds of formulae (1) and (2) can be readily synthesized through reaction of mercaptotriazoles or mercaptoimidazoles with acid chlorides. Alternatively, they can be readily synthesized by methods as described in "New Experimental Chemistry Series," Vol. 14, pp. 1801-1803 (Japan Chemical Society Ed.), for example, disproportionation reaction of sulfinic acids, oxidation of disulfides, reaction of disulfides with sulfinic acid salts, and reaction of sulfinic acid salts with sulfinyl halides.
- the compounds of formula (1) and/or (2) may be used alone or in admixture of two or more. They may be used in an appropriate amount for their purpose, preferably 0.1 to 40 mol%, more preferably 0.5 to 10 mol% based on the total amount of silver salts used.
- the compound of formula (1) or (2) may be added in any suitable form, for example, as a solution, emulsion, solid particle dispersion, or a state mordanted with a polymeric mordant.
- the compound is added in a solid particle dispersion or similar form without using organic solvents.
- the solid particle dispersion may be prepared by well-known dispersion techniques. Exemplary dispersing machines which can be used are sand mills, attritors, pearl mills, super mills, ball mills, impellers, dispersers, KD mills, colloidal mills, dynatrons, three-roll mills, pressure kneaders, Manton Gaulin, and microfluidizers.
- dispersed particles usually have a mean particle size of 0.05 to 10.0 ⁇ m, preferably 0.05 to 5 ⁇ m, more preferably 0.05 to 1.0 ⁇ m, most preferably 0.1 to 0.6 ⁇ m.
- polyhydric alcohols e.g., glycerin and diols as described in USP 2,960,404
- fatty acids and esters thereof as described in USP 2,588,765 and 3,121,060
- silicone resins as described in BP 955,061
- contrast enhancers may be used for forming ultrahigh contrast images. Included are hydrazine derivatives as described in USP 5,464,738, 5,496,695, 5,512,411, 5,536,622, Japanese Patent Application Nos. 228627/1995, 215822/1996, 130842/1996, 148113/1996, 156378/1996, 148111/1996, and 148116/1996; compounds having a quaternary nitrogen atom as described in Japanese Patent Application No. 83566/1996, and acrylonitrile compounds as described in USP 5,545,515.
- Illustrative examples are compounds 1 to 10 in USP 5,464,738, compounds H-1 to H-28 in USP 5,496,695, compounds I-1 to I-86 in Japanese Patent Application No. 215822/1996, compounds H-1 to H-62 in 130842/1996, compounds I-1 to I-21 in 148113/1996, compounds 1 to 50 in 148111/1996, compounds 1 to 40 in 148116/1996, and compounds P-1 to P-26 and T-1 to T-18 in 83566/1996, and compounds CN-1 to CN-13 in USP 5,545,515.
- ultrahigh contrast promoting agents may be used in combination with the contrast enhancers for forming ultrahigh contrast images.
- ultrahigh contrast promoting agents include the amine compounds described in USP 5,545,505, specifically Compounds AM-1 to AM-5 therein, the hydroxamic acids described in USP 5,545,507, specifically HA-1 to HA-11 therein, the acrylonitriles described in USP 5,545,507, specifically CN-1 to CN-13 therein, the hydrazine compounds described in USP 5,558,983, specifically CA-1 to CA-6 therein, the onium salts described in Japanese Patent Application No. 132836/1996, specifically A-1 to A-42, B-1 to B-27 and C-1 to C-14.
- any desired dyes and pigments may be used in the inventive photosensitive layer.
- Useful pigments and dyes include those described in Colour Index and both organic and inorganic, for example, pyrazoloazole dyes, anthraquinone dyes, azo dyes, azomethine dyes, oxonol dyes, carbocyanine dyes, styryl dyes, triphenylmethane dyes, indoaniline dyes, indophenol dyes, and phthalocyanine dyes.
- the preferred dyes used herein include anthraquinone dyes leg., Compounds 1 to 9 described in JP-A 341441/1993 and Compounds 3-6 to 3-18 and 3-23 to 3-38 described in JP-A 165147/1993), azomethine dyes (e.g., Compounds 17 to 47 described in JP-A 341441/1993), indoaniline dyes (e.g., Compounds 11 to 19 described in JP-A 289227/1993, Compound 47 described in JP-A 341441/1993 and Compounds 2-10 to 2-11 described in JP-A 165147/1993), and azo dyes (e.g., Compounds 10 to 16 described in JP-A 341441/1993).
- azomethine dyes e.g., Compounds 17 to 47 described in JP-A 341441/1993
- indoaniline dyes e.g., Compounds 11 to 19 described in JP-A 289227/1993
- the dyes and pigments may be added in any desired form such as solution, emulsion or solid particle dispersion or in a form mordanted with polymeric mordants.
- the amounts of these compounds used are determined in accordance with the desired absorption although the compounds are generally used in amounts of 1 ⁇ g to 1 g per square meter of the imaging element.
- a surface protective layer may be provided in the photothermographic element according to the present invention for the purpose of preventing sticking of the image forming layer.
- the protective layer is situated far from the image forming layer on the support and may include two or more layers.
- At least one of protective layers preferably contains gelatin in an amount of at least 50% by weight, especially at least 70% by weight of the binder. More preferably, gelatin constitutes at least 50% by weight, especially at least 70% by weight of the binder in the outermost layer.
- any desired anti-sticking material may be used.
- the anti-sticking material include wax, silica particles, styrene-containing elastomeric block copolymers (e.g., styrene-butadiene-styrene and styrene-isoprene-styrene), cellulose acetate, cellulose acetate butyrate, cellulose propionate and mixtures thereof.
- surfactants for facilitating application, and other addenda are optionally added to the surface protective layer.
- a hardener may be used in the protective layer in the practice of the invention. In the absence of a hardener, the layer is less resistant to water and becomes tacky or dissolved with water droplets, which is obstructive to handling as an image forming element.
- hardener examples include polyvalent metal ions described on page 78, polyisocyanates as described in USP 4,281,060 and JP-A 208193/1994, epoxy compounds as described in USP 4,791,042, and vinyl sulfones as described in JP-A 89048/1987.
- polyvalent metal ions such as chromium and aluminum ions are especially preferred.
- the amount of the hardener used may be sufficient to achieve the desired purpose although it is preferably 1 ⁇ mol to 1 mmol, more preferably 5 ⁇ mol to 200 ⁇ mol per gram of gelatin based on the overall amount of gelatin which is present on the side of the support where the image forming layer is formed.
- the hardener is added as a solution.
- the time when the solution of the hardener is added to the protective layer coating solution should be from 30 minutes to immediately before application, preferably from 10 minutes to 10 seconds before application. No particular limits are imposed on the mixing procedure and conditions insofar as the benefits of the invention are achievable.
- Illustrative mixing procedures include a procedure of adding the hardener solution to a tank at a flow rate, mixing in the tank and pumping the solution to a coater at a delivery rate, the tank being designed to provide a desired average residence time as calculated from the flow rate and the delivery rate; and a procedure using the static mixer described in N. Harnby, M.F. Edwards & A.W. Nienow (translated by Takahashi), "Livid Mixing Technology,” Nikkan Kogyo Shinbun, 1989, Chap. 8.
- the photosensitive layer or a protective layer therefor there may be used light absorbing substances and filter dyes as described in USP 3,253,921, 2,274,782, 2,527,583, and 2,956,879.
- the dyes may be mordanted as described in USP 3,282,699.
- the filer dyes are used in such amounts that the layer may have an absorbance of 0.1 to 3, especially 0.2 to 1.5 at the exposure wavelength.
- matte agents for example, starch, titanium dioxide, zinc oxide, and silica as well as polymer beads including beads of the type described in USP 2,992,101 and 2,701,245.
- the emulsion layer side surface may have any degree of matte insofar as no star dust failures occur although a Bekk smoothness of 200 to 10,000 seconds, especially 300 to 10,000 seconds is preferred.
- an antihalation layer may be disposed on the side of the photosensitive layer remote from the light source.
- the antihalation layer preferably has a maximum absorbance of 0.3 to 2 in the desired wavelength range, more preferably an absorbance of 0.5 to 2 at the exposure wavelength, and an absorbance of 0.001 to less than 0.5 in the visible region after processing, and is also preferably a layer having an optical density of 0.001 to less than 0.3.
- an antihalation dye is used in the invention, it may be selected from various compounds insofar as it has the desired absorption in the wavelength range, is sufficiently low absorptive in the visible region after processing, and provides the antihalation layer with the preferred absorbance profile.
- Exemplary antihalation dyes are given below though the dyes are not limited thereto.
- Useful dyes which are used alone are described in JP-A 56458/1984, 216140/1990, 13295/1995, 11432/1995, USP 5,380,635, JP-A 68539/1990, page 13, lower-left column, line 1 to page 14, lower-left column, line 9, and JP-A 24539/1991, page 14, lower-left column to page 16, lower-right column.
- a dye which will decolorize during processing is further preferable in the practice of the invention to use a dye which will decolorize during processing.
- decolorizable dyes are disclosed in JP-A 139136/1977, 132334/1978, 501480/1981, 16060/1982, 68831/1982, 101835/1982, 182436/1984, 36145/1995, 199409/1995, JP-B 33692/1973, 16648/1975, 41734/1990, USP 4,088,497, 4,283,487, 4,548,896, and 5,187,049.
- the photothermographic element of the invention is a one-side photosensitive element having at least one photosensitive layer containing a silver halide emulsion on one side and a back layer on the other side of the support.
- a matte agent may be added to the one-side photosensitive element for improving transportation efficiency.
- the matte agents used herein are generally microparticulate water-insoluble organic or inorganic compounds.
- exemplary water-dispersible vinyl polymers include polymethyl acrylate, polymethyl methacrylate, polyacrylonitrile, acrylonitrile- ⁇ -methylstyrene copolymers, polystyrene, styrene-divinyl-benzene copolymers, polyvinyl acetate, polyethylene carbonate, and polytetrafluoroethylene;
- exemplary cellulose derivatives include methyl cellulose, cellulose acetate, and cellulose acetate propionate;
- exemplary starch derivatives include carboxystarch, carboxynitrophenyl starch, urea-formaldehyde-starch reaction products, gelatin hardened with well-known curing agents, and hardened gelatin which has been coaceruvation hardened into microcapsulated hollow particles.
- Preferred examples of the inorganic compound which can be used as the matte agent include silicon dioxide, titanium dioxide, magnesium dioxide, aluminum oxide, barium sulfate, calcium carbonate, silver chloride and silver bromide desensitized by a well-known method, glass, and diatomaceous earth.
- the aforementioned matte agents may be used as a mixture of substances of different types if necessary.
- the size and shape of the matte agent are not critical.
- the matte agent of any particle size may be used although matte agents having a particle size of 0.1 ⁇ m to 30 ⁇ m are preferably used in the practice of the invention.
- the particle size distribution of the matte agent may be either narrow or wide. Nevertheless, since the haze and surface luster of coating are largely affected by the matte agent, it is preferred to adjust the particle size, shape and particle size distribution of a matte agent as desired during preparation of the matte agent or by mixing plural matte agents.
- the back layer should preferably have a degree of matte as expressed by a Bekk smoothness of 10 to 250 seconds, more preferably 50 to 180 seconds.
- the matte agent is preferably contained in an outermost surface layer, a layer functioning as an outermost surface layer, a layer close to the outer surface or a layer functioning as a so-called protective layer.
- the binder used in the back layer is preferably transparent or translucent and generally colorless.
- binders are naturally occurring polymers, synthetic resins, polymers and copolymers, and other film-forming media, for example, gelatin, gum arabic, poly(vinyl alcohol), hydroxyethyl cellulose, cellulose acetate, cellulose acetate butyrate poly(vinyl pyrrolidone), casein, starch, poly(acrylic acid), polylmethyl methacrylate), polyvinyl chloride, poly(methacrylic acid), copoly(styrene-maleic anhydride), copoly(styrene-acrylonitrile), copoly(styrene-butadiene), polyvinyl acetals (e.g., polyvinyl formal and polyvinyl butyral), polyesters, polyurethanes, phenoxy resins, poly(vinylidene chloride), polyepoxides, polycarbonates, poly(
- the back layer preferably exhibits a maximum absorbance of 0.3 to 2, more preferably 0.5 to 2 in the predetermined wavelength range and an absorbance of 0.001 to less than 0.5 in the visible range after processing. Further preferably, the back layer has an optical density of 0.001 to less than 0.3. Examples of the antihalation dye used in the back layer are the same as previously described for the antihalation layer.
- a backside resistive heating layer as described in USP 4,460,681 and 4,374,921 may be used in a photographic thermographic image system according to the present invention.
- a hardener may also be used in various layers such as back layers other than the image forming layer and protective layer.
- Examples of the hardener are described in T.H. James, "The Theory of the Photographic Process," Fourth Edition, Macmillan Publishing Co., Inc., 1977, pp. 77-87, and include polyvalent metal ions described on page 78, polyisocyanates as described in USP 4,281,060 and JP-A 208193/1994, epoxy compounds as described in USP 4,791,042, and vinyl sulfones as described in JP-A 89048/1987.
- polyesters e.g., polyethylene terephthalate and polynaphthalene terephthalate
- polyolefins e.g., polyethylene and polypropylene
- cellulose derivatives e.g., cellulose diacetate and cellulose triacetate
- styrene polymers e.g., polystyrene and poly- ⁇ -methylstyrene
- polycarbonate e.g., polystyrene and poly- ⁇ -methylstyrene
- PET biaxially oriented polyethylene terephthalate
- a polyester film is preferably stretched at a draw ratio of about 2 to 8, especially about 3 in both longitudinal and transverse directions. After stretching in both longitudinal and transverse directions, the film may be heat treated at about 80 to about 200°C for about 10 seconds to about 20 minutes.
- the thickness of the support is preferably about 20 to 500 ⁇ m, more preferably about 50 to 300 ⁇ m.
- the support is dyed with any of well-known dyestuffs or pigments.
- the support is preferably dyed to such an extent that the dyed support may have an optical density of about 0.1 to 1.5, more preferably about 0.2 to 1.0 at the absorption wavelength of the dyestuff or pigment used.
- the support used herein may be subject to surface treatment such as UV treatment, corona treatment, glow treatment or flame treatment, if desired.
- surface treatment such as UV treatment, corona treatment, glow treatment or flame treatment, if desired.
- the support is provided with a subbing layer.
- the subbing layer is based on a binder which is preferably a polyester or styrene-butadiene copolymer.
- Other additives such as matte agents, surfactants, crosslinking agents and dyestuffs are added to the subbing layer, if desired.
- the respective layers can be formed by various coating procedures including dip coating, air knife coating, flow coating, and extrusion coating using a hopper of the type described in USP 2,681,294. If desired, two or more layers may be concurrently coated by the methods described in USP 2,761,791 and BP 837,095.
- An undercoat coating solution A was prepared by adding 2.5 g of polystyrene microparticulates having a mean particle size of 0.4 ⁇ m and 20 ml of a 1 wt% solution of Surfactant A to 200 ml of a 30 wt% water dispersion of a polyester copolymer Pesresin A-515GB (Takamatsu Yushi K.K.). Distilled water was added to a total volume of 1,000 ml.
- An undercoat coating solution C was prepared by dissolving 10 g of inert gelatin in 500 ml of distilled water and adding thereto 40 g of a 40 wt% water dispersion of tin oxide-antimony oxide composite microparticulates as described in JP-A 20033/1986. Distilled water was added to a total volume of 1,000 ml.
- the support used was a biaxially oriented PET film of 175 ⁇ m thick tinted with a Blue Dyestuff, which was subject to corona discharge treatment on one surface (photosensitive layer side) thereof.
- the undercoat coating solution A was applied by means of a bar coater in a wet coverage of 5 cc/m 2 , followed by drying at 180°C for 5 minutes.
- the undercoat layer had a dry thickness of about 0.3 ⁇ m.
- the support was subject to corona discharge treatment on the back surface thereof.
- the undercoat coating solution B was applied by means of a bar coater in a wet coverage of 5 cc/m 2 , followed by drying at 180°C for 5 minutes to form a back undercoat having a dry thickness of about 0.3 ⁇ m.
- the undercoat coating solution C was applied onto the back undercoat by means of a bar coater in a wet coverage of 3 cc/m 2 , followed by drying at 180°C for 5 minutes to form a second back undercoat having a dry thickness of about 0.03 ⁇ m.
- the subbed support was completed in this way.
- a slurry was obtained by adding 850 grams of water to 100 grams of 1,1-bis(2-hydroxy-3,5-dimethylphenyl)-3,5,5-trimethylhexane and 50 grams of hydroxypropyl cellulose and thoroughly mixing them. This slurry was introduced into a vessel together with 840 grams of zirconia beads having an average diameter of 0.5 mm.
- a dispersing machine (1/4G Sand Grinder Mill by Imex K.K.) was operated for 5 hours for dispersion, obtaining a reducing agent dispersion.
- a slurry was obtained by adding 940 grams of water to 50 grams of tribromomethylphenylsulfone and 10 grams of hydroxypropyl cellulose and thoroughly mixing them. This slurry was introduced into a vessel together with 840 grams of zirconia beads having an average diameter of 0.5 mm.
- a dispersing machine (1/4G Sand Grinder Mill by Imex K.K.) was operated for 5 hours for dispersion, obtaining a dispersion of the organic polyhalogenated compound.
- the thus obtained silver halide grains were heated at 60°C, to which 85 ⁇ mol of sodium thiosulfate, 11 ⁇ mol of 2,3,4,5,6-pentafluorophenyldiphenylphosphine selenide, 15 ⁇ mol of Tellurium Compound, 3 ⁇ mol of chloroauric acid, and 270 ⁇ mol of thiocyanic acid were added per mol of silver.
- the emulsion was ripened for 120 minutes and then quenched to 40°C.
- An emulsion layer coating solution was prepared by mixing 1,350 grams of the organic acid silver dispersion, 140 cc of a 20 wt% aqueous solution of PVA205, 37 cc of a 10 wt% aqueous solution of phthalazine, 220 grams of the reducing agent dispersion, 61 grams of the organic polyhalogenated compound dispersion, 1,100 grams of a binder (P-1 to P-5 shown below and in Table 1), and 120 grams of the silver halide emulsion, the dispersions being as prepared above.
- a coating solution for the protective layer was prepared by dissolving 145 grams of inert gelatin in 1,110 cc of warm water, and adding thereto 400 grams of 20 wt% poly(ethyl acrylate) latex, 57 cc of 1N sulfuric acid, 10 cc of a 5 wt% aqueous solution of a sodium salt of di(2-ethylhexyl) sulfosuccinate, and 280 cc of a 10 wt% methanol solution of phthalic acid.
- a coating solution for the overcoat layer was prepared by dissolving 129 grams of inert gelatin in 1,650 cc of warm water, adding thereto 130 grams of a gelatin dispersion containing 12 wt% of microparticulate poly(methyl methacrylate) having a mean particle size of 2.5 ⁇ m, 65 cc of 1N sulfuric acid, and 20 cc of a 5 wt% aqueous solution of a sodium salt of di(2-ethylhexyl) sulfosuccinate to form a matted solution, and adding a 2 wt% aqueous solution of chromium (III) potassium sulfate dodecahydrate (as a hardener) to the matted solution at a ratio of 0.3:1.
- a base solution was prepared by dispersing 10 grams of a salt of N,N',N'',N'''-tetraethylguanidine and 4-carboxysulfonyl-phenylsulfone in a molar ratio of 1:2 as a solid base in 10 grams of polyvinyl alcohol PVA205 (Kurare K.K.) and 88 grams of water in a dispersing machine (1/16G Sand Grinder Mill by Imex K.K.).
- An organic solvent phase was prepared by mixing and dissolving 2.1 grams of a Basic Dye Precursor, 79 grams of an Acidic Substance, and 10 grams of ethyl acetate. This organic solvent phase was mixed with an aqueous solution phase consisting of 10 grams of polyvinyl alcohol PVA205 (Kurare K.K.) and 80 grams of water, emulsified and dispersed at room temperature, obtaining a dyestuff solution having a mean particle size of 2.5 ⁇ m.
- a back surface coating solution was prepared by mixing 39 grams of the base solution, 26 grams of the dyestuff solution, and 36 grams of a 10 wt% aqueous solution of polyvinyl alcohol PVA205 (Kurare K.K.).
- a back surface protective layer coating solution was prepared by dissolving 20 grams of gelatin, 0.6 gram of polymethyl methacrylate having a mean particle size of 7 ⁇ m, 0.4 gram of sodium dodecylbenzenesulfonate, and 1 gram of X-22-2809 silicone compound (by Shin-Etsu Silicone K.K.) in 480 grams of water.
- the back layer coating solution in a flow rate to provide an optical density of 0.7 at 647 nm and the back surface protective layer coating solution in an amount of 50 g/m 2 were concurrently applied in a multiple manner, using a coater as shown in Figure 11b.1 on page 427 of Stephan F. Kistler and Peter M. Schweizer, LIQUID FILM COATING, CHAPMAN & HALL, 1997.
- the emulsion layer coating solution, intermediate layer coating solution, protective layer coating solution and overcoat layer coating solution were concurrently coated in the described order from the substrate side in amounts of 82 cc/m 2 , 6.5 cc/m 2 , 12.5 cc/m 2 , and 12 cc/m 2 , respectively.
- a solution or dispersion of the binder used in the photosensitive layer was coated on a glass plate and dried at 50°C for one hour to form a model polymer film of 100 ⁇ m thick.
- the model polymer film was stripped from the glass plate and allowed to stand at 25°C and RH 60% for 3 days before its weight (W1) was measured.
- the model polymer film was then allowed to stand at 25°C in vacuum for 3 days.
- a dispersion of the binder (polymer latex) used in the photosensitive layer was adjusted to a latex concentration of 10% by weight and a volume of 50 ml.
- 0.1N HCl By slowly adding 0.1N HCl, the solution was adjusted to pH 2.5.
- a 0.1N NaOH solution was added dropwise to the solution at a rate of 0.05 ml/drop.
- a conductivity was measured at 1 minute of dropwise addition. From this conductometric titration, a titration curve was drawn as shown in FIG. 1.
- the titration curve includes an initial conductivity decline straight line segment A, a conductivity rise segment after the start of neutralization of carboxyl groups (normally broken into two straight lines B1 and B2), and a conductivity rise straight line segment C after the completion of neutralization. From an intersection P1 between straight lines A and B1 and an intersection P2 between straight lines B2 and C, the distance a between P1 and P2 is determined.
- Photosensitive element samples were prepared as in Example 1 except that binders Q-1 to Q-6 were used in the preparation of the emulsion layer coating solution.
- binders Q-1 to Q-5 correspond to binders P-1 to P-5 in Example 1, respectively.
- the mean molecular weight is the same while the acid monomer is omitted.
- Q-6 -(MMA) 31.4 -(St) 41.9 -(2EHA) 26.2 -(MAA) 0.5 - latex mean molecular weight 34,000 mean particle size 130 nm
- a photothermographic element wherein a photothermographic layer has been formed by applying a coating solution in which a binder containing at least 50% by weight of a polymer latex characterized by a surface acid content is dispersed in a solvent containing at least 30% by weight of water, followed by drying.
- the photothermographic element can be prepared from an aqueous coating solution which is desirable from the ecological and safety standpoints while it has improved photographic properties.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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JP31145997 | 1997-10-27 | ||
JP31145997A JPH11133539A (ja) | 1997-10-27 | 1997-10-27 | 熱現像感光材料 |
JP311459/97 | 1997-10-27 |
Publications (2)
Publication Number | Publication Date |
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EP0911692A2 true EP0911692A2 (fr) | 1999-04-28 |
EP0911692A3 EP0911692A3 (fr) | 2000-02-02 |
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Application Number | Title | Priority Date | Filing Date |
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EP98119773A Withdrawn EP0911692A3 (fr) | 1997-10-27 | 1998-10-22 | Eléments photothermographiques |
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EP (1) | EP0911692A3 (fr) |
JP (1) | JPH11133539A (fr) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1186948A1 (fr) * | 2000-09-11 | 2002-03-13 | Agfa-Gevaert | Matériau d'enregistrement photothermographique ayant une photosensibilité accrue |
US6423481B1 (en) | 2001-01-23 | 2002-07-23 | Eastman Kodak Company | High speed photothermographic materials with combined chemical sensitizers and methods of using same |
US6576413B2 (en) | 2000-09-11 | 2003-06-10 | Agfa-Gevaert | Photothermographic recording material with increased photosensitivity |
US6713241B2 (en) | 2002-08-09 | 2004-03-30 | Eastman Kodak Company | Thermally developable emulsions and imaging materials containing binder mixture |
EP1571491A1 (fr) * | 2004-03-05 | 2005-09-07 | Fuji Photo Film Co., Ltd. | Matériau photothermographique et procédé de formation d'image |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4369876B2 (ja) | 2004-03-23 | 2009-11-25 | 富士フイルム株式会社 | ハロゲン化銀感光材料および熱現像感光材料 |
US20060057512A1 (en) | 2004-09-14 | 2006-03-16 | Fuji Photo Film Co., Ltd. | Photothermographic material |
JP2006084703A (ja) | 2004-09-15 | 2006-03-30 | Fuji Photo Film Co Ltd | 熱現像感光材料 |
JP6152846B2 (ja) * | 2012-03-30 | 2017-06-28 | 日本ゼオン株式会社 | 二次電池負極用スラリー組成物 |
CN104205442A (zh) * | 2012-06-18 | 2014-12-10 | Jsr株式会社 | 蓄电设备电极用粘结剂组合物、蓄电设备电极用浆料、蓄电设备电极和蓄电设备 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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WO1993012183A1 (fr) * | 1991-12-03 | 1993-06-24 | Rohm And Haas Company | Dispersion aqueuse de particules composites comprenant du latex polymere |
WO1997004355A1 (fr) * | 1995-07-18 | 1997-02-06 | Agfa-Gevaert Naamloze Vennootschap | Materiau d'enregistrement photo-thermographique revetu a partir d'un milieu aqueux |
EP0803764A1 (fr) * | 1996-04-26 | 1997-10-29 | Fuji Photo Film Co., Ltd. | Matériau photothermographique et procédé de fabrication |
EP0887701A1 (fr) * | 1997-06-26 | 1998-12-30 | Fuji Photo Film Co., Ltd. | Procédé de préparation d'une solution de revêtement pour un matériau photosensible de formation d'image et matériaux photothermographiques |
EP0902322A1 (fr) * | 1997-09-09 | 1999-03-17 | Fuji Photo Film Co., Ltd. | Eléments d'enregistrement thermographique |
-
1997
- 1997-10-27 JP JP31145997A patent/JPH11133539A/ja active Pending
-
1998
- 1998-10-22 EP EP98119773A patent/EP0911692A3/fr not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1993012183A1 (fr) * | 1991-12-03 | 1993-06-24 | Rohm And Haas Company | Dispersion aqueuse de particules composites comprenant du latex polymere |
WO1997004355A1 (fr) * | 1995-07-18 | 1997-02-06 | Agfa-Gevaert Naamloze Vennootschap | Materiau d'enregistrement photo-thermographique revetu a partir d'un milieu aqueux |
EP0803764A1 (fr) * | 1996-04-26 | 1997-10-29 | Fuji Photo Film Co., Ltd. | Matériau photothermographique et procédé de fabrication |
EP0887701A1 (fr) * | 1997-06-26 | 1998-12-30 | Fuji Photo Film Co., Ltd. | Procédé de préparation d'une solution de revêtement pour un matériau photosensible de formation d'image et matériaux photothermographiques |
EP0902322A1 (fr) * | 1997-09-09 | 1999-03-17 | Fuji Photo Film Co., Ltd. | Eléments d'enregistrement thermographique |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1186948A1 (fr) * | 2000-09-11 | 2002-03-13 | Agfa-Gevaert | Matériau d'enregistrement photothermographique ayant une photosensibilité accrue |
US6576413B2 (en) | 2000-09-11 | 2003-06-10 | Agfa-Gevaert | Photothermographic recording material with increased photosensitivity |
US6423481B1 (en) | 2001-01-23 | 2002-07-23 | Eastman Kodak Company | High speed photothermographic materials with combined chemical sensitizers and methods of using same |
US6713241B2 (en) | 2002-08-09 | 2004-03-30 | Eastman Kodak Company | Thermally developable emulsions and imaging materials containing binder mixture |
EP1571491A1 (fr) * | 2004-03-05 | 2005-09-07 | Fuji Photo Film Co., Ltd. | Matériau photothermographique et procédé de formation d'image |
Also Published As
Publication number | Publication date |
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EP0911692A3 (fr) | 2000-02-02 |
JPH11133539A (ja) | 1999-05-21 |
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