Multi-layer photoreceptor containing siloxane on a metal oxide layer
AssigneeXerox Corporation
InventorLeon A. Teuscher
Life of this patent
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Abstract
An electrostatographic imaging member having two electrically operative layers including a charge transport layer and a charge generating layer, the electrically operative layers overlying a siloxane film coated on a metal oxide layer of a metal conductive anode, said siloxane film comprising a reaction product of a hydrolyzed silane having the following general formula: ##STR1## wherein R.sub.1 is an alkylidene group containing 1 to 20 carbon atoms, and R.sub.2 and R.sub.3, are independently selected from the group consisting of H, a lower alkyl group containing 1 to 3 carbon atoms, a phenyl group, and a poly(ethylene-amino) group, said siloxane having reactive OH and ammonium groups attached to silicon atoms.
Claims20
A process for preparing an electrostatographic imaging member capable of accepting a negative electrostatic charge, said member having an imaging surface and comprising at least two electrically operative layers comprising a charge transport layer and a contiguous charge generating layer overlying a film comprising a siloxane reaction product of a hydrolyzed silane having reactive OH and ammonium groups attached to silicon atoms of said siloxane, said film being contiguous to a metal oxide layer of a conductive metal anode layer, said conductive anode layer being on one side of said two electrically operative layers and said imaging surface being on the opposite side of said two electrically operative layers, comprising providing a hydrolyzed silane having the general formula selected from the group consisting of:
- ##STR7## and mixtures thereof, wherein R.sub.1 is an alkylidene group containing 1 to 20 carbon atoms, R.sub.2 and R.sub.3 are independently selected from the group consisting of H, a lower alkyl group containing 1 to 3 carbon atoms, a phenyl group and a poly(ethylene-amino) group, R.sub.7 is selected from the group consisting of H, a lower alkyl group containing 1 to 3 carbon atoms and a phenyl group, X is an anion from an acid or acidic salt, n is 1, 2 3 or 4, and y is 1, 2, 3 or 4 in sufficient water to form an aqueous solution while maintaining said aqueous solution at a pH between about 4 and about 10 with an acidic composition selected from the group consisting of an acid, acidic salt and mixtures thereof, contacting said metal oxide layer of said conductive anode layer with said aqueous solution to form a coating, drying said coating to form a film of said siloxane reaction product on said metal oxide layer, and applying said two electrically operative layers to said film.
A process for preparing an imaging member according to claim 9 wherein said nonaqueous polar solvent is ethanol.
An imaging member capable of accepting a negative electrostatic charge, said member having an imaging surface and comprising at least two electrically operative layers comprising a charge transport layer and a contiguous charge generating layer overlying a film comprising a siloxane dried reaction product of a hydrolyzed silane having reactive OH and ammonium groups attached to silicon atoms of said siloxane, said film being contiguous to a metal oxide layer of a conductive metal anode layer, said conductive anode layer being on one side of said two electrically operative layers, and said imaging surface being on the opposite side of said two electrically operative layers, said hydrolyzed silane having the general formula selected from the group consisting of:
- ##STR9## and mixtures thereof, wherein R.sub.1 is an alkylidene group containing 1 to 20 carbon atoms, R.sub.2 and R.sub.3 are independently selected from the group consisting of H, a lower alkyl group containing 1 to 3 carbon atoms, a phenyl group and a poly(ethylene-amino) group, R.sub.7 is selected from the group consisting of H, a lower alkyl group containing 1 to 3 carbon atoms and a phenyl group, X is an anion from an acid or acidic salt, n is 1, 2 3 or 4 and y is 1, 2, 3 or 4.
An imaging member comprising a charge generating layer and a contiguous charge transport layer overlying a layer comprising a reaction product between a hydrolyzed silane and a metal oxide layer of a conductive anode layer, said hydrolyzed silane having the general formula:
- ##STR10## and mixtures thereof, wherein R.sub.1 is an alkylidene group containing 1 to 20 carbon atoms, R.sub.2 and R.sub.3 are independently selected from the group consisting of H, a lower alkyl group containing 1 to 3 carbon atoms, a phenyl group and a poly(ethylene-amino) group, n is 1, 2 or 3, and y is 1, 2, 3 or 4, said imaging member exhibiting the capabilty of accepting a uniform negative electrostatic charge prior to imagewise exposure.
An electrophotographic imaging process comprising providing an imaging member having an imaging surface and comprising at least two electrically operative layers comprising a charge generating layer and a contiguous charge transport layer said electrically operative layers overlying a film comprising a siloxane reaction product of a hydrolyzed silane having reactive OH and ammonium groups attached to silicon atoms said film being contiguous to a metal oxide layer of a conductive metal anode layer, said conductive anode layer being on one side of said two electrically operative layers and said imaging surface being on the opposite side of said two electrically operative layers, said hydrolyzed silane having the general formula selected from the group consisting of:
- ##STR13## and mixtures thereof, wherein R.sub.1 is an alkylidene group containing 1 to 20 carbon atoms, R.sub.2 and R.sub.3 are independently selected from the group consisting of H, a lower alkyl group containing 1 to 3 carbon atoms, a phenyl group and a poly(ethylene-amino) group, R.sub.7 is selected from the group consisting of H, a lower alkyl group containing 1 to 3 carbon atoms and a phenyl group, X is an anion from an acid or acidic salt, n is 1, 2, 3, or 4, and y is 1, 2, 3, or 4, said imaging member exhibiting the capabilty of accepting a uniform negative electrostatic charge prior to imagewise exposure, repeatedly depositing a uniform negative electrostatic charge on said imaging surface and discharging said imaging surface to drive metal cations from said conductive metal anode layer toward said imaging surface, and reacting said cations with said reactive OH and ammonium groups attached to said silicon atoms.
Dependencies are inferred from the claim text.