GB378885A - Improved process of sensitising photographic emulsions - Google Patents
Improved process of sensitising photographic emulsionsInfo
- Publication number
- GB378885A GB378885A GB7642/31A GB764231A GB378885A GB 378885 A GB378885 A GB 378885A GB 7642/31 A GB7642/31 A GB 7642/31A GB 764231 A GB764231 A GB 764231A GB 378885 A GB378885 A GB 378885A
- Authority
- GB
- United Kingdom
- Prior art keywords
- methyl
- dry
- naphthothiazole
- condensed
- alkyl
- 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
- G03C1/14—Methine and polymethine dyes with an odd number of CH groups
- G03C1/18—Methine and polymethine dyes with an odd number of CH groups with three CH groups
-
- 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
- G03C5/18—Diazo-type processes, e.g. thermal development, or agents therefor
Landscapes
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems (AREA)
- Plural Heterocyclic Compounds (AREA)
Abstract
Thiocarbocyanine dyes; orthocarboxylic acid esters.--The Specification as open to inspection under Sect. 91 (3) (a) relates to the manufacture of a sensitizing 8-alkyl-, 8-aralkyl-, 8-arylthiocarbocyanine dye derived from a 2-methyl-b -naphthothiazole. The following examples are given: (1) 2-methyl-b -naphthothiazole is condensed with ethyl-p-toluene-sulphonate and the quaternary ammonium salt is condensed with two molecular proportions of triethyl orthoacetate in dry pyridine; ammonium bromide is then added to give 8-methyl-2.2<1>-diethyl-3.4 : 3<1>.4<1>-dibenzothiocarbocyanine bromide; various 8-alkyl-, 8-aralkyl-, or 8-arylthiocarbocyanines may similarly be prepared by using the appropriate orthocarboxylic acid ester containing linked to the carboxy carbon atom the desired alkyl-, aralkyl, or aryl group; for example, trialkyl orthopropionate, methyldiethyl orthoisocaproate, or trialkyl orthophenylacetate may be used: (2) 2-methyl-b -naphthothiazole ethyl-p-toluenesulphonate is condensed with 2 mols. of trimethyl-orthopropionate in pyridine, and a hot solution of potassium iodide then added to give 2 : 2<1>. 8 - triethyl - 3.4 : 3<1>.4<1> - dibenzothiocarbocyanine iodide: (3) 2-methyl-b -naphthothiazole methyl-p-toluenesulphonate is condensed with 2 mols. of methyldiethyl-orthoisocaproate in pyridine, and potassium iodide then added to give 2,2<1>-dimethyl-8-isoamyl-3.4 : 3<1>.4<1>-dibenzthio carbocyanine iodide. The alkyl groups in the 2 2<1>-positions may be similar or dissimilar. Trimethyl orthopropionate is prepared by dissolving propionitrile in a mixture of dry methyl alcohol and dry ether and passing in dry hydrochloric acid gas; the crystalline product obtained is dried and treated with dry methyl alcohol, then distilled under reduced pressure. Methyldiethyl orthoisocaproate may be prepared in a somewhat similar manner from isocapronitrile. Specification 359,463 is referred to. This subject-matter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US435104A US1846301A (en) | 1930-03-12 | 1930-03-12 | Photographic emulsion |
Publications (1)
Publication Number | Publication Date |
---|---|
GB378885A true GB378885A (en) | 1932-08-12 |
Family
ID=23727000
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB7642/31A Expired GB378885A (en) | 1930-03-12 | 1931-03-12 | Improved process of sensitising photographic emulsions |
Country Status (4)
Country | Link |
---|---|
US (2) | US1846301A (en) |
BE (1) | BE378116A (en) |
FR (1) | FR712995A (en) |
GB (1) | GB378885A (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1132796B (en) * | 1961-06-03 | 1962-07-05 | Adox Fotowerke Dr C Schleussne | Process for the optical sensitization of photographic silver halide emulsions |
JPS5221366B2 (en) * | 1971-11-29 | 1977-06-10 | ||
DE69131075T2 (en) * | 1991-12-18 | 1999-08-12 | Fuji Photo Film Co., Ltd., Minami-Ashigara, Kanagawa | PHOTOGRAPHIC SILVER HALOGENID MATERIAL |
-
0
- US US184630D patent/USB184630I5/en active Pending
- BE BE378116D patent/BE378116A/xx unknown
-
1930
- 1930-03-12 US US435104A patent/US1846301A/en not_active Expired - Lifetime
-
1931
- 1931-03-10 FR FR712995D patent/FR712995A/en not_active Expired
- 1931-03-12 GB GB7642/31A patent/GB378885A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
USB184630I5 (en) | |
BE378116A (en) | |
FR712995A (en) | 1931-10-16 |
US1846301A (en) | 1932-02-23 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB871936A (en) | Sensitized photographic silver halide emulsions containing colour couplers | |
GB460594A (en) | Manufacture of colouring matters from ª¤-arylene dicyanides | |
GB378885A (en) | Improved process of sensitising photographic emulsions | |
US2156464A (en) | Production of polymethin dyestuffs | |
GB968396A (en) | Improvements in dye sensitized photographic emulsions | |
GB415949A (en) | Process for sensitising photographic silver halide emulsions | |
GB483045A (en) | Manufacture of polymethine dyestuffs and of sensitised photographic emulsions | |
GB378870A (en) | Improvements in and relating to the manufacture of light-sensitive photographic materials | |
GB392410A (en) | Manufacture of carbocyanine dyes and intermediate products | |
GB408277A (en) | Manufacture of carbo cyanine dyes | |
GB400951A (en) | Sensitising silver halide emulsion layers | |
GB468226A (en) | Manufacture of aniline derivatives | |
US1969444A (en) | Dibenzothiocarbocyanine dye and process of preparing it | |
US2255407A (en) | Quinrhodine quaternary salts and dyes therefrom | |
GB378455A (en) | Improvements in sensitising photographic emulsions | |
GB512494A (en) | Manufacture of cyanine and styryl dyestuffs | |
US2243081A (en) | Process of preparing 8-alkyl unsymmetrical carbocyanine dyes | |
GB511940A (en) | Improvements in and relating to the production of carbocyanine-like dyestuffs and tothe sensitising of photographic silver halide emulsions | |
GB477990A (en) | Dyestuffs and process of making same | |
GB432969A (en) | Process for sensitising photographic silver halide emulsions and manufacture of sensitising dyes therefor | |
GB349455A (en) | Improvements relating to barbituric acid derivatives | |
US2071994A (en) | Thiazole trimethine cyanines | |
SU93374A1 (en) | The method of obtaining thia-, selenium- and thiacelene-carbocyanine dyes | |
GB593023A (en) | Improvements in photographic emulsions and in the manufacture of dyes therefor | |
SU382663A1 (en) | METHOD OF OBTAINING a-PYRIDINIYHINO-CARBOCYANINO- |