Title: Antistatic photographic X-ray film having a uniform protective surface coating of surfactant oligomer of tetrafluoroethylene

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.

Do you think this is a good invention? Vote now:

Votes so far: For:(0) Against:(0)
Other info:

Inventors: Mackey, E. Scudder (Binghamton, NY, US)

Application Number: 887763
Filing Date: 1978-03-17
Publication_date: 1979-11-27
Assignee: GAF Corporation (New York, NY)
Primary Class(es): 430/539 252/500, 252/511, 260/DIG15
Other Classes:
US Patent Ref:

3589906	Jun, 1971	McDowell	96/85.
3753716	Aug, 1973	Ishihara et al.	96/87.
3775126	Nov, 1973	Babbitt et al.	96/87.
3779768	Dec, 1973	Cope et al.	96/87.
3850642	Nov, 1974	Bailey et al.	96/87.
3884699	May, 1975	Cavallo et al.	96/87.

Other Refs:
Primary Examiner: Welsh, John D.
Assistant Examiner:
Attorney: Kehm; Walter C., Katz; Walter