GB615431A - Improvements in and relating to colour sensitised silver-halide emulsions and photographic materials coated therewith - Google Patents
Improvements in and relating to colour sensitised silver-halide emulsions and photographic materials coated therewithInfo
- Publication number
- GB615431A GB615431A GB25125/45A GB2512545A GB615431A GB 615431 A GB615431 A GB 615431A GB 25125/45 A GB25125/45 A GB 25125/45A GB 2512545 A GB2512545 A GB 2512545A GB 615431 A GB615431 A GB 615431A
- Authority
- GB
- United Kingdom
- Prior art keywords
- carboxybenzyl
- prepared
- bromide
- chloro
- chloride
- 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
- G03C1/08—Sensitivity-increasing substances
- G03C1/10—Organic substances
- G03C1/12—Methine and polymethine dyes
- G03C1/24—Styryl dyes
Abstract
3-Chloro-4-methylbenzoyl chloride is prepared by heating together 3-chloro-p-methylbenzoic acid and thionyl chloride. 3-Chloro-4-chloromethylbenzoyl chloride is prepared by chlorinating 3-chloro-4-methylbenzoyl chloride in sunlight. 0-Chloro-p-carboxybenzylchloride is prepared by refluxing 3-chloro-4-chloromethylbenzoyl chloride with water. 2-Methylbenzoxazole-p-carboxybenzyl bromide is prepared by heating together 2-methylbenzoxazole and p-carboxybenzyl bromide. 2 : 4-Dimethylthiazole - p - carboxybenzyl bromide and 2 - methylbenzthiazole - p - carboxybenzyl bromide are similarly prepared. 2-b -Anilinovinylbenzoxazole-p-carboxybenzyl bromide is prepared by heating together 2-methylbenzoxazole - p - carboxybenzyl bromide and dipenylformamidine. 2-b -Anilinovinylbenzoxazole benzyl bromide is similarly prepared.ALSO:In a cyanine or styryl dye, the nitrogen atom of at least one heterocyclic nucleus has attached thereto substituted in m- or p-position an aralkyl group substituted by one or more carboxyl groups. The dyes may be formed from quaternary salts derived from a heterocyclic nitrogen base and m-carboxybenzyl chloride, or o-chloro-p-carboxybenzyl chloride. In example (1), a carbocyanine is obtained by reacting in acetic anhydride 2-methylbenzoxazole p-carboxybenzyl bromide and ethyl orthoformate. In example (2), a carbocyanine is prepared by reacting 2 : 4-dimethylthiazole p-carboxybenzyl bromide with 2-b -anilinovinylbenzoxazole p-carboxybenzyl bromide. In example (3), a pseudocyanine is prepared by reacting 2 - methylmercaptoquinoline ethobromide with 2-methylbenzthiazole p-carboxybenzyl bromide. In example (4), a styryl dye is prepared by reacting p-dimethylaminobenzaldehyde with 2 : 4-dimethylthiazole p-carboxybenzyl bromide. In example (5), a carbocyanine is prepared by reacting 2-methylbenzoxazole p-carboxybenzyl bromide with 2-b -anilinovinylbenzoxazole benzyl bromide.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE238344X | 1942-06-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB615431A true GB615431A (en) | 1949-01-06 |
Family
ID=5903524
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB25125/45A Expired GB615431A (en) | 1942-06-06 | 1945-09-27 | Improvements in and relating to colour sensitised silver-halide emulsions and photographic materials coated therewith |
Country Status (5)
| Country | Link |
|---|---|
| BE (1) | BE450888A (en) |
| CH (1) | CH238344A (en) |
| FR (1) | FR895151A (en) |
| GB (1) | GB615431A (en) |
| NL (1) | NL60086C (en) |
-
1943
- 1943-05-25 NL NL111486A patent/NL60086C/xx active
- 1943-06-01 BE BE450888D patent/BE450888A/xx unknown
- 1943-06-01 FR FR895151D patent/FR895151A/en not_active Expired
- 1943-06-05 CH CH238344D patent/CH238344A/en unknown
-
1945
- 1945-09-27 GB GB25125/45A patent/GB615431A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| NL60086C (en) | 1947-10-15 |
| CH238344A (en) | 1945-07-15 |
| BE450888A (en) | 1943-07-31 |
| FR895151A (en) | 1945-01-17 |
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