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 agents

Info

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
Application number
BE767486A
Other languages
French (fr)
Original Assignee
Andersson Lars Olov
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Andersson Lars Olov filed Critical Andersson Lars Olov
Priority to BE767486A priority Critical patent/BE767486A/en
Publication of BE767486A publication Critical patent/BE767486A/en

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

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.
BE767486A 1971-05-21 1971-05-21 Sensitizers for photographic emulsions-by reaction of silver salts wi - andsilver complexing agents BE767486A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
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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