GB677264A - Improvements in and relating to stabilisers for photographic emulsions - Google Patents
Improvements in and relating to stabilisers for photographic emulsionsInfo
- Publication number
- GB677264A GB677264A GB2748549A GB2748549A GB677264A GB 677264 A GB677264 A GB 677264A GB 2748549 A GB2748549 A GB 2748549A GB 2748549 A GB2748549 A GB 2748549A GB 677264 A GB677264 A GB 677264A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bis
- diazaindolizine
- dihydroxy
- methylene
- hydroxy
- 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.)
- Expired
Links
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
- G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
- G03C5/26—Processes using silver-salt-containing photosensitive materials or agents therefor
- G03C5/29—Development processes or agents therefor
- G03C5/305—Additives other than developers
Landscapes
- Nitrogen Condensed Heterocyclic Rings (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
Abstract
<FORM:0677264/IV (b)/1> Compounds of the general formula of Fig. 1, wherein D represents the atoms to complete an iminazole, iminazoline, aryleneiminazole, or triazole nucleus, R1 is OH, R2 is OH, substituted or unsubstituted alkyl, and X is a chemical bond or an aliphatic chain, which may be interrupted by aromatic rings or hetero atoms and when X represents CH2, the two groups, R2 may represent a single chemical bond, are prepared by condensing a compound of the formula of Fig. 2 with a compound of the formula of Fig. 3, wherein R3 is carbalkoxy and R4 is COR2, or when X is CH2, the two R4 groups may be -CO-CO-. 6 : 61 - Methylene - bis - 5 : 7 - dihydroxy-1 : 2 - benz - 3 : 4 - diazaindolizine is prepared by heating together 1 : 3-propanetetracarboxylic acid tetraethyl ester and 2-aminobenziminazole. 6 : 61 - Methylene - bis - 5 - methyl - 7-hydroxy - 1 : 3 : 4 - triazaindolizine, 6 : 61-ethylene - bis - 5 - methyl - 7 - hydroxy - 1 : 3 : 4-triazaindolizine, 6 : 61 - methylene - bis - 5 : 7-dihydroxy - 1 : 2 - chlorobenz - 3 : 4 - diazaindolizine, 6 : 61 - ethylene - bis - 5 - methyl-7 - hydroxy - 1 : 2 - benz - 3 : 4 - diazaindolizine, 6 : 61 - bis - 4 : 7 - dihydroxy - 1 : 2 - benz-3 : 4 - diazaindolizine, 6 : 61 - bis - 5 : 7 - dihydroxy - 1 : 3 : 4 - triazaindolizine, 6 : 61 - mxylylene - bis - 5 - methyl - 7 - hydroxy - 1 : 2-benz - 3 : 4 - diazaindolizine, 6 : 61 - methylene-bis - 5 - methyl - 7 - hydroxy - 1 - 2 - benz - 3 : 4-diazaindolizine, 6 : 61 - methylene - bis - 5 : 7-dihydroxy - 1 : 2 - (11 : 21 - naphtha) - 3 : 4-diazaindolizine, 1 : 5 - di - (5 : 7 - dihydroxy-1 : 2 - benz - 3 : 4 - diazaindolizinyl) - diethyl ether, the compound of Fig. 15, 6 : 61-methylene-bis - 5 : 7 - dihydroxy - 1 : 2 - dihydro - 3 : 4-diazaindolizine, 6 : 61 - ethylene - bis - 6-methyl - 7 - hydroxy - 1 : 2 - diphenyl - 3 : 4-diazaindolizine, and 6 : 61 - methylene - bis-2 - phenyl - 5 - methyl - 7 - hydroxy - 1 : 3 : 4-triazaindolizine are similarly prepared. 4 : 5 - Diphenyl - 2 - aminoiminazole is prepared by coupling 4 : 5-diphenyliminazole with diazotized sulphanilic acid and reducing the azo dye obtained.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2748549A GB677264A (en) | 1949-10-26 | 1949-10-26 | Improvements in and relating to stabilisers for photographic emulsions |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2748549A GB677264A (en) | 1949-10-26 | 1949-10-26 | Improvements in and relating to stabilisers for photographic emulsions |
Publications (1)
Publication Number | Publication Date |
---|---|
GB677264A true GB677264A (en) | 1952-08-13 |
Family
ID=10260354
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2748549A Expired GB677264A (en) | 1949-10-26 | 1949-10-26 | Improvements in and relating to stabilisers for photographic emulsions |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB677264A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4038081A (en) * | 1975-02-28 | 1977-07-26 | Konishiroku Photo Industry Co., Ltd. | Development method |
US4095982A (en) * | 1975-10-24 | 1978-06-20 | Fuji Photo Film Co., Ltd. | Method of developing a silver halide photographic light-sensitive material |
-
1949
- 1949-10-26 GB GB2748549A patent/GB677264A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4038081A (en) * | 1975-02-28 | 1977-07-26 | Konishiroku Photo Industry Co., Ltd. | Development method |
US4095982A (en) * | 1975-10-24 | 1978-06-20 | Fuji Photo Film Co., Ltd. | Method of developing a silver halide photographic light-sensitive material |
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