BE767486A - Sensitizers for photographic emulsions-by reaction of silver salts wi - andsilver complexing agents - Google Patents
Sensitizers for photographic emulsions-by reaction of silver salts wi - andsilver complexing agentsInfo
- Publication number
- BE767486A BE767486A BE767486A BE767486A BE767486A BE 767486 A BE767486 A BE 767486A BE 767486 A BE767486 A BE 767486A BE 767486 A BE767486 A BE 767486A BE 767486 A BE767486 A BE 767486A
- Authority
- BE
- Belgium
- Prior art keywords
- sensitizers
- pref
- photographic emulsions
- andsilver
- reaction
- Prior art date
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
- G03C1/04—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein with macromolecular additives; with layer-forming substances
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G79/00—Macromolecular compounds obtained by reactions forming a linkage containing atoms other than silicon, sulfur, nitrogen, oxygen, and carbon with or without the latter elements in the main chain of the macromolecule
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- General Physics & Mathematics (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
Sensitizers for photographic emulsions contains, as recurring units, groups, identical or different, of formula -Ag-S-R, in which R is an organic radical 1 to 6 C atoms, pref. 2 to 4, substituted by one or more hydrophilic groups chosen so that the sum of charges of the polymer are 0 or, pref. positive and esp. organic radicals substituted by -NH2-, -OH, quanidino- and/or carboxy groups, particularly 2-aminoethyl. The sensitizers are made by reacting a water soln. of a silver salt with, pref. a slight excess of a water soln. of a mercaptan of formula RSH, in the presence of a cpd. pref. NH4OH or tris-hydroxy-methyl-amino methane, capable of forming a complex with silver.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE767486A BE767486A (en) | 1971-05-21 | 1971-05-21 | Sensitizers for photographic emulsions-by reaction of silver salts wi - andsilver complexing agents |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE767486A BE767486A (en) | 1971-05-21 | 1971-05-21 | Sensitizers for photographic emulsions-by reaction of silver salts wi - andsilver complexing agents |
Publications (1)
Publication Number | Publication Date |
---|---|
BE767486A true BE767486A (en) | 1971-11-22 |
Family
ID=3858171
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BE767486A BE767486A (en) | 1971-05-21 | 1971-05-21 | Sensitizers for photographic emulsions-by reaction of silver salts wi - andsilver complexing agents |
Country Status (1)
Country | Link |
---|---|
BE (1) | BE767486A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0713132A1 (en) | 1994-11-18 | 1996-05-22 | Minnesota Mining And Manufacturing Company | Chemical sensitisation of silver halide emulsions |
-
1971
- 1971-05-21 BE BE767486A patent/BE767486A/en unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0713132A1 (en) | 1994-11-18 | 1996-05-22 | Minnesota Mining And Manufacturing Company | Chemical sensitisation of silver halide emulsions |
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