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US 5,236,797 AGranted
Electrophotographic elements containing phospha-2,5-cyclohexadiene compounds as electron-transport agents
AssigneeEastman Kodak Company
InventorsTeh-Ming Kung, Chin H. Chen
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Abstract
Electrophotographic elements contain certain chemical compounds as electron-transport agents, which are substituted derivatives of phospha-2,5-cyclohexadiene. These compounds have good solubility or dispersibility in organic solvents and polymeric binders, and they exhibit good electron-transport properties in electrophotographic elements.
Claims2
In an electrophotographic element comprising:
- an electrically conductive layer;
- a charge-generation layer comprising a charge-generating material;
- and a charge-transport layer comprising a polymeric film containing an electron-transport agent,
- the improvement wherein the electron-transport agent comprises a chemical compound having the structure ##STR4## wherein Ar.sup.1 and Ar.sup.2 each independently represents an aryl group of 6 to about 10 carbon atoms, R represents an aryl, alkyl, aralkyl, or cycloalkyl group of 1 to about 10 carbon atoms, and Z is oxygen or C(CN).sub.2.
1 more element
Dependencies are inferred from the claim text.