Electrically tunable and stable imaging members
AssigneeXerox Corporation
InventorsRobert C. U. Yu, Stephen T. Avery, Jimmy E. Kelly
Life of this patent
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Abstract
Embodiments provide novel imaging members used in electrostatography. More particularly, there is provided flexible electrophotographic imaging members which have improved imaging layer(s) formulated to comprise of a plasticizer in a material matrix of a solid solution comprising a charge transporting compound and a film forming polymer binder which is a novel A-B diblock copolymer or a binary polymer blend of a novel A-B diblock copolymer and a bisphenol polycarbonate. The flexible imaging members thus prepared have improved photoelectrical cyclic function stability, chemical resistive property, and are curl-free, and thus eliminate the need for an additional anticurl back coating layer.
Claims25
An imaging member comprising:
- a flexible substrate;
- a charge generating layer disposed on the substrate;
- and
- at least one charge transport layer disposed on the charge generating layer, wherein the charge transport layer comprises
- at least one liquid plasticizing compound in a solid solution further comprising
- a diamine charge transport component, and
- a polycarbonate binder, wherein the polycarbonate binder is an A-B diblock copolymer comprising two segmental blocks of a bisphenol A carbonate (C16H14O3) block (A) and a phthalic acid containing terminal block (B) capable of providing protection against amine species contaminants, and further wherein the imaging member does not include an anticurl back coating layer.
An imaging member comprising:
- a flexible substrate;
- a charge generating layer disposed on the substrate;
- and
- a dual-layer charge transport layer including a bottom charge transport layer disposed on the charge generating layer and a top exposed charge transport layer disposed on the bottom charge transport layer, wherein each layer of the dual-layer charge transport layer comprises
- at least one liquid plasticizing compound present in the same weight percent in a solid solution further comprising
- a diamine charge transport component, and
- a polycarbonate binder, wherein the polycarbonate binder is an A-B diblock copolymer comprising two segmental blocks of a bisphenol A polycarbonate (C16H14O3) and a phthalic acid, and further wherein the imaging member does not include an anticurl back coating layer.
An imaging member comprising:
- a flexible substrate;
- a charge generating layer disposed on the substrate;
- and
- a multiple-layer charge transport layer including a bottom charge transport layer disposed on the charge generating layer, a plurality of middle charge transport layers disposed on the bottom charge transport layer, and a top exposed charge transport layer disposed on the plurality of middle charge transport layers, wherein each of layer of the multiple-layer charge transport layer comprises
- at least one liquid plasticizing compound present in the same weight percent in a solid solution further comprising
- a diamine charge transport component, and
- a polycarbonate binder, wherein the polycarbonate binder is an A-B diblock copolymer comprising two segmental blocks of a bisphenol A polycarbonate (C16H14O3) and a phthalic acid, and further wherein the imaging member does not include an anticurl back coating layer.
Dependencies are inferred from the claim text.