GB667199A - Process for stabilizing photographic emulsions - Google Patents
Process for stabilizing photographic emulsionsInfo
- Publication number
- GB667199A GB667199A GB1533249A GB1533249A GB667199A GB 667199 A GB667199 A GB 667199A GB 1533249 A GB1533249 A GB 1533249A GB 1533249 A GB1533249 A GB 1533249A GB 667199 A GB667199 A GB 667199A
- Authority
- GB
- United Kingdom
- Prior art keywords
- carbethoxy
- hydroxy
- diazaindolizine
- amino
- benz
- 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
- G03C1/00—Photosensitive materials
- G03C1/005—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein
- G03C1/06—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein with non-macromolecular additives
- G03C1/34—Fog-inhibitors; Stabilisers; Agents inhibiting latent image regression
Abstract
<FORM:0667199/IV (b)/1> <FORM:0667199/IV (b)/2> <FORM:0667199/IV (b)/3> Compounds of the general formula of Fig. 1, wherein D represents the atoms to complete an iminazole, iminazoline, or arylene iminazoline nucleus, R1 is H, alkyl, or aryl, R2 is an ester, nitrile, or carboxyl group, and R3 is OH or NH2, are prepared by reacting an amine of the formula of Fig. 2 with a compound of the formula of Fig. 3, wherein R4 has the same significance as R2 and R5 is a substituted or unsubstituted alkoxy group. 5 - Hydroxy - 6 - carbethoxy - 1 : 2 - benz - 3 : 4 - diazaindolizine is prepared by boiling together 2-aminobenziminazole and diethyl ethoxymethylenemalonate in acetic acid. The following derivatives of 1 : 2-benz-3 : 4-diazaindoline are similarly prepared: 5-amino-9-carbethoxy-, 5 - amino - 6 - cyano-, 5 - hydroxy - 6 - carbethoxy - x - chloro -, 5 - hydroxy - 6 - carbethoxy - 7 - methyl -, 5 - amino - 6 - carbethoxy - 7 - methyl-, and 5 - hydroxy - 6 - carbethoxy - 7 - phenyl. 5 - Amino - 6 - carbethoxy - 7 - methyl - 1 : 2 - di-hydroxy - 3 : 4 - diazaindolizine and 5 - hydroxy - 6 - carbethoxy - 1 : 2 : 11 : 21 - naphtha - 3 : 4 - diazaindolizine are also similarly prepared. 5 - Hydroxy - 6 - carboxy - 1 : 2 - benz - 3 : 4 - diazaindolizine is prepared by the saponification of 5 - hydroxy - 6 - carbethoxy - 1 : 2 - benz - 3 : 4-diazaindolizine in 10 per cent sodium hydroxide solution. According to the Provisional Specification, R2 may be H or any electronegative group (e.g. an amide group), and R5 may be a substituted or unsubstituted amino group.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1533249A GB667199A (en) | 1949-06-08 | 1949-06-08 | Process for stabilizing photographic emulsions |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1533249A GB667199A (en) | 1949-06-08 | 1949-06-08 | Process for stabilizing photographic emulsions |
Publications (1)
Publication Number | Publication Date |
---|---|
GB667199A true GB667199A (en) | 1952-02-27 |
Family
ID=10057229
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1533249A Expired GB667199A (en) | 1949-06-08 | 1949-06-08 | Process for stabilizing photographic emulsions |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB667199A (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
- 1949-06-08 GB GB1533249A patent/GB667199A/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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