PRIMER COATING, POLYESTER FILM HAVING A PRIMER COATING, AND A PROCESS FOR COATING FILM

A polyester film coated with a novel primer coating and overcoated with one or more gelatin-aziridine coatings makes an excellent photographic film. The primer coating has about 85 - 90% by weight of a water-dispersible copolyester and about 1 - 15% by weight of an anionic surfactant. The water-disp...

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Bibliographische Detailangaben
Hauptverfasser:	KREJCI, JAMES J, HEBERGER, JOHN M
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ADHESIVES AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G AUXILIARY PROCESSES IN PHOTOGRAPHY CHEMICAL PAINT OR INK REMOVERS CHEMISTRY CINEMATOGRAPHY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS CORRECTING FLUIDS DYES ELECTROGRAPHY ELECTROPHOTOGRAPHY FILLING PASTES GENERAL PROCESSES OF COMPOUNDING HOLOGRAPHY INKS MAGNETOGRAPHY METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS ORGANIC MACROMOLECULAR COMPOUNDS PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR,STEREO-PHOTOGRAPHIC PROCESSES PHOTOGRAPHY PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES PHYSICS POLISHES THEIR PREPARATION OR CHEMICAL WORKING-UP USE OF MATERIALS THEREFOR WOODSTAINS WORKING-UP
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Beschreibung
Zusammenfassung:	A polyester film coated with a novel primer coating and overcoated with one or more gelatin-aziridine coatings makes an excellent photographic film. The primer coating has about 85 - 90% by weight of a water-dispersible copolyester and about 1 - 15% by weight of an anionic surfactant. The water-dispersible copolyester contains about 80 - 90 mol % of at least one dicarboxylic acid or its ester equivalent; about 1 - 20 mol % of a sulfomonomer containing a sulfonate group attached to a dicarboxylic nucleus, and about 100 mol % of at least one glycol having 2 - 11 carbon atoms. The gelatin-aziridine coating contains about 0.5 to 100% by weight of aziridine, based on the weight of the gelatin. The gelatin-aziridine coating is sufficient to provide adhesion to or serve as a photographic gelatin coating and the aziridine being sufficient to bond the gelatin to the primed film. The gelatinaziridine coating may constitute a single uniformly blended layer, or separate layers of gelatin and of aziridine with each layer diffused into the other. A process for producing a film useful as a photographic substrate is also disclosed.