Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Identified backing or protective layer containing
Patent
1978-03-17
1979-11-27
Welsh, John D.
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Identified backing or protective layer containing
252500, 260DIG15, 252511, G03C 138
Patent
active
041759699
ABSTRACT:
This invention relates to photographic elements having a coatable, non-photoactive protective surface of improved antistatic properties. The improvement is accomplished by incorporation into this layer of an anionic fluorocarbon surfactant which is characterized by being low molecular weight oligomers of tetrafluoroethylene. In a preferred embodiment of the invention, a gelatin surface protective layer of an X-ray film includes about 1.0-3.5% by weight, based on the gelatin solids of the layer, of oligomers of tetrafluoroethylene having a large amount of hydrophilic fluoroalkyl branching in the fluorocarbon chain.
REFERENCES:
patent: 3589906 (1971-06-01), McDowell
patent: 3753716 (1973-08-01), Ishihara et al.
patent: 3775126 (1973-11-01), Babbitt et al.
patent: 3779768 (1973-12-01), Cope et al.
patent: 3850642 (1974-11-01), Bailey et al.
patent: 3884699 (1975-05-01), Cavallo et al.
GAF Corporation
Katz Walter
Kehm Walter C.
Welsh John D.
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