Hardening of photographic protein-containing layers by acrolein polymers containing carboxylic groups

An aqueous protein composition comprises a solution of a protein, preferably gelatine, in water containing in dissolved form an acrolein copolymer, said copolymer being (a) a copolymer of 50 to 95 parts by weight of acrolein and 5 to 50 parts by weigh of a vinyl compound containing in the a -positio...

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Bibliographic Details
Main Authors HIMMELMANN WOLFGANG, RIEBEL ALEXANDER, MULLER ERWIN ALFONS
Format Patent
LanguageEnglish
Published 06.08.1968
Subjects
AUXILIARY PROCESSES IN PHOTOGRAPHY
CHEMISTRY
CINEMATOGRAPHY
COMPOSITIONS BASED THEREON
COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
ELECTROGRAPHY
HOLOGRAPHY
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR,STEREO-PHOTOGRAPHIC PROCESSES
PHOTOGRAPHY
PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES
PHYSICS
THEIR PREPARATION OR CHEMICAL WORKING-UP
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Summary:An aqueous protein composition comprises a solution of a protein, preferably gelatine, in water containing in dissolved form an acrolein copolymer, said copolymer being (a) a copolymer of 50 to 95 parts by weight of acrolein and 5 to 50 parts by weigh of a vinyl compound containing in the a -position to the double bond at least one carboxyl group or (b) a copolymer having recurring units of the general formula <FORM:1021007/C3/1> wherein X has a value of 10 and Y is an integer of between 1 and 50. Copolymers (b) are obtained by reaction of strong alkalies with polyacrolein. The copolymers are used in amounts of 0.5 to 4% by weight based on dry gelatine. Copolymers of acrolein with acrylic, methacrylic and maleic acids are exemplified. The compositions may also contain silver halide emulsions.
Bibliography:Application Number: US19640373554