摘要:
An electrophotographic article having a complex of charge generating material and at least one transfer material selected from the group consisting of electron transfer material and hole transfer material is formed by admixing the charge generating material, at least one transfer material, and an organic binder in a solvent to form a coatable dispersion comprising a complex of charge generating material and said at least one transfer material; and coating said coatable dispersion onto a conductive substrate to form a charge transfer layer on the electrophotoconductive article. A novel S-form titanyl oxyphthalocyanine is also preferred, the novel form displaying major peaks of Bragg's 2theta angle to the CuK-alpha characteristic X-ray (wavelength 1.541 Angstrom) at least at 9.5 ±0.2 degrees, 9.7 ±0.2 degrees, 11.7 ±0.2 degrees, 13.5 ±0.2 degrees, (optionally at 21 ±0.2 degrees and/or 23.5 ±0.2 degrees,) 24.1 ±0.2 degrees, 26.4 ±0.2 degrees, and 27.3 ±0.2 degrees group. Additional peaks, approaching or equivalent to major peaks, may also be present as 15.0, 15.3 and 16.0 ±0.2 degrees.
摘要:
Improved organophotoreceptors comprise an electrically conductive substrate; a photoconductive element comprising a charge generation compound; and an overcoat layer comprising a first binder and at least a salt, wherein the photoconductive element is on the electrically conductive substrate, wherein the overcoat layer is on the photoconductive element and wherein the binder is not a silsesquioxane polymer. Specifically, the present invention provides an organophotoreceptor comprising: a) an electrically conductive substrate; b) a photoconductive element comprising at least a charge generation compound wherein the photoconductive element is on the electrically conductive substrate; and c) an overcoat layer comprising a first binder and at least an inorganic ionic salt wherein the overcoat layer is on the photoconductive element and wherein the binder is not a silsesquioxane polymer, an electrophotographic imaging apparatus comprising: (a) a light imaging component; and (b) the above-described organophotoreceptor oriented to receive light from the light imaging component, and an electrophotographic imaging process comprising: (a) applying an electrical charge to a surface of the above-described organophotoreceptor; (b) imagewise exposing the surface of the organophotoreceptor to radiation to dissipate charge in selected areas and thereby form a pattern of charged and uncharged areas on the surface; (c) contacting the surface with a toner to create a toned image; and (d) transferring the toned image to a substrate.
摘要:
A crystalline phase of titanyl phthalocyanine, referred to herein as the S-phase, has an internal blend of lattice arrangements is provided by treatment of the gamma-form of titanyl phthalocyanine. The S-phase is a truly new phase, and not a mixture of particles of various phases (e.g., combinations of the beta-phase and the gamma-phase), with internal lattice distributions of atoms and molecules forming a new, non-continuous, non-uniform lattice structure. The X-ray spectrum shows a blend of diffraction peaks, having peaks that have previously been distinctly present only collectively among various crystalline forms of titanyl phthalocyanine, but can now be provided in a single crystalline form. The visible spectra show significant absorption differences. The novel S-form titanyl phthalocyanine is also used in a photoconductor displaying major peaks of Bragg's 2theta angle to the CuK-alpha characteristic X-ray (wavelength 1.541 Angstrom) at least at 9.5 ±0.2 degrees, 9.7 ±0.2 degrees, 11.7 ±0.2 degrees, 13.5 ±0.2 degrees, (optionally at 21 ±0.2 degrees and/or 23.5 ±0.2 degrees,) 24.1 ±0.2 degrees, 26.4 ±0.2 degrees, and 27.3 ±0.2 degrees group. Additional peaks, approaching or equivalent to major peaks, may also be present as 15.0, 15.3 and 16.0 ±0.2 degrees.
摘要:
The present invention provides an intermediate transfer member onto which a toner image is formed as a first image bearing member, and to which the toner image is first transferred and from which the first transferred toner image is transferred a second time onto a second image bearing member; the intermediate transfer member comprising; a non-conductive flexible film layer, a layer of an electrically conductive material affixed to a first surface of the non-conductive flexible film layer, and the electrically conductive material layer having an electrically resistive polymeric coating thereon.
摘要:
A photoreceptor with good mechanical and physical properties is provided with an overcoat layer comprising a copolymer of an α,β-ethylenically unsaturated carboxylic acid and an α,β-ethylenically unsaturated monomer wherein the weight percent of the α,β-ethylenically unsaturated carboxylic acid is at least 10% by weight of the copolymer. The copolymer may comprise an α,β-ethylenically unsaturated carboxylic acid and an α,β-ethylenically unsaturated monomer wherein the copolymer has an acid value of at least 60 mg KOH/g the copolymer. The copolymer may be present in a blend with a second polymer or copolymer comprised of units derived from a second α,β-ethylenically unsaturated monomer that is different from the an α,β-ethylenically unsaturated carboxylic acid and/or the α,β-ethylenically unsaturated monomer. The copolymer or the copolymer blend may be present in a layer that is crosslinked or crosslinkable, the crosslinking being effected through a distinct crosslinking agent that reacts with groups) on the an α,β-ethylenically unsaturated carboxylic acid or the α,β-ethylenically unsaturated monomer.
摘要:
This invention relates to an improved organophotoreceptor that comprises an electrically conductive substrate; a photoconductive element comprising a charge generation compound and a salt of an electron transport compound. In some embodiments, the photoconductive element has a photoconductive layer with the charge generation compound and an overcoat layer with the salt of the electron transport compound in which the photoconductive layer is on the electrically conductive substrate and the overcoat layer is on the photoconductive layer. Specifically, the present invention provides an organophotoreceptor comprising:
a) an electrically conductive substrate; and b) a photoconductive element comprising a charge generation compound and a salt of an electron transport compound, wherein the photoconductive element is on the electrically conductive substrate, an electrophotographic imaging apparatus comprising:
(a) a light imaging component; and (b) the above-described organophotoreceptor oriented to receive light from the light imaging component, and an electrophotographic imaging process comprising:
(a) applying an electrical charge to a surface of the above-described organophotoreceptor; (b) imagewise exposing the surface of the organophotoreceptor to radiation to dissipate charge in selected areas and thereby form a pattern of charged and uncharged areas on the surface; (c) contacting the surface with a toner to create a toned image; and (d) transferring the toned image to a substrate.
摘要:
A photoreceptor with good mechanical and physical properties is provided with an overcoat layer comprising a copolymer of an α,β-ethylenically unsaturated carboxylic acid and an α,β-ethylenically unsaturated monomer wherein the weight percent of the α,β-ethylenically unsaturated carboxylic acid is at least 10% by weight of the copolymer. The copolymer may comprise an α,β-ethylenically unsaturated carboxylic acid and an α,β-ethylenically unsaturated monomer wherein the copolymer has an acid value of at least 60 mg KOH/g the copolymer. The copolymer may be present in a blend with a second polymer or copolymer comprised of units derived from a second α,β-ethylenically unsaturated monomer that is different from the an α,β-ethylenically unsaturated carboxylic acid and/or the α,β-ethylenically unsaturated monomer. The copolymer or the copolymer blend may be present in a layer that is crosslinked or crosslinkable, the crosslinking being effected through a distinct crosslinking agent that reacts with groups) on the an α,β-ethylenically unsaturated carboxylic acid or the α,β-ethylenically unsaturated monomer.