Eastman-kodak Company

Richard Norman Kelley

Gerald A Campbell

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.

Photographic silver halide element with a layer of sulfonated polymer

Antistatic compositions comprising a highly crosslinked vinylbenzyl quaternary ammonium polymer and a hydrophobic binder are described. Elements, particularly photographic elements, having a layer of the antistatic compositions are also described. The compositions are characterized by a binder to antistatic polymer ratio of about 10:1 to 1:1. The compositions are highly conductive in thin layers and retain substantial conductivity at low relative humidity. Layers of the antistatic compositions are particularly useful for photographic elements because they can be contacted over a wide range of conditions with a hydrophilic layer without resulting in ferrotyping.

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Fairport, NY, United States of America

Richard Norman Kelley