Photographic silver halide element with a layer of sulfonated polymer
AssigneeEastman Kodak Company
InventorsGerald A. Campbell, Richard N. Kelley
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Abstract
Disclosed herein are microgel compositions useful for the preparation of electrically conductive or antistatic layers in radiation sensitive materials, and particularly in photographic materials. The compositions comprise an aqueous dispersion of a sulfonated crosslinked polymer, preferably mixed with a binder. The polymer particles average less than one micron in diameter. Also disclosed herein is a method of preparing these microgel compositions.
Claims7
A radiation sensitive element comprising a support and having coated thereon a photographic silver halide emulsion layer and a layer comprising a sulfonated water-dispersible polymer in an amount sufficient to provide resistivity which is less than about 10.sup.9 ohm/sq. at 50% relative humidity and 24.degree. C., said polymer having latex particles less than 1.0 micron in size and comprising:
- a. about 50 to about 99.9 mole percent of at least one polymerized and then sulfonated monovinyl aromatic monomer;
- b. about 0.1 to about 20 mole percent of at least one polymerized polyvinyl monomer;
- and
- c. 0 to about 50 mole percent of at least one other polymerized .alpha.,.beta.-ethylenically unsaturated monomer.
A photographic element comprising a support and having coated thereon a silver halide emulsion layer and a layer comprising a sulfonated poly(vinyl toluene-codivinyl benzene) in an amount sufficient to provide resistivity which is less than about 10.sup.9 ohm/sq. at 50% humidity and 24.degree. C., and a binder in a weight ratio of binder to polymer of from about 0.2:1 to about 10:1.
Dependencies are inferred from the claim text.