Primer coating, polyester film having a primer coating, and a pr

Details Primer coating, polyester film having a primer coating, and a pr Primer coating, polyester film having a primer coating, and a pr

1994-06-01

1996-03-05

Seidleck, James J.

Stock material or miscellaneous articles

Composite

Of polyester

128294, 128295, B32B 2736

Patent

active

054966477

ABSTRACT:
A polyester film coated with a novel primer coating and overcoated with one or more gelatin-aziridine coatings makes an excellent photographic film as well as for other suitable purposes like reprographic film, x-ray film, etc. 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 80-98 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.

REFERENCES:
patent: 4476189 (1984-10-01), Posey et al.
patent: 4888381 (1989-12-01), Pankratz
Japanese Laid-Open Patent Application (Kokai) No. 3-265843 Nov. 26, 1991 "A Polyester Film for Photosensitive Materials and a Method for Manufacturing Said Film" (copy of original document and copy of complete English translation).

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