C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
C09D 167/00 (2006.01) C08J 7/04 (2006.01) C09D 167/02 (2006.01) C09D 189/00 (2006.01) C11D 1/12 (2006.01) G03C 1/795 (2006.01) G03C 1/93 (2006.01) G03G 5/10 (2006.01) G03G 5/14 (2006.01)
Patent
CA 2094230
ABSTRACT OF THE DISCLOSURE 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 gelatin- aziridine 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.
Heberger John M.
Krejci James J.
Hoechst Celanese Corporation
Smart & Biggar
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