Photographic element and polyester photographic film base therefor
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United States of America Patent
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Jun 17, 1997
Issued Date -
N/A
app pub date -
May 9, 1996
filing date -
Feb 17, 1995
priority date (Note) -
Expired
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Abstract
A polyester photographic film support having a surface coated with a subbing layer which comprises a mixture of gelatin and a polymer where the gelatin to polymer ratio is less than 97:3 and such that the combination of dry coverage and weight fraction of gelatin in the mixture satisfies the equation: C+1.32.times.Z.gtoreq.0.825, where C is dry coverage in g/m.sup.2 and Z is the weight fraction of gelatin, and the polymer comprises: a) from 1 to 60 weight percent of recurring units derived from a vinyl monomer having a primary amine addition salt component or aminostyrene addition salt component; b) from 0 to 50 weight percent of recurring units derived from a hydrophilic vinyl monomer; and c) from 20 to 98 weight percent of recurring units derived from a hydrophobic nonionic vinyl monomer.
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