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7364825 |
Charge transport materials having a nitrogen-containing-heterocycle hydrazone group
Improved organophotoreceptor comprises an electrically conductive substrate and a photoconductive element on the electrically conductive substrate, the photoconductive element comprising:
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7358014 |
Electrophotographic organophotoreceptors with novel charge transport compounds
A novel charge transport compound, a novel process using that novel compound and an organophotoreceptor includes:
(a) a novel charge transport compound having the formula
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7220523 |
Bridged charge transport materials having two bicyclic heterocycle hydrazones
Improved organophotoreceptor comprises an electrically conductive substrate and a photoconductive element on the electrically conductive substrate, the photoconductive element comprising:
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7169519 |
Double-layered positively-charged organic photoreceptor
A double-layered positively-charged organic photoreceptor t does not suffer from contamination caused by charge transport compounds that dissolve out during coating of a charge generating layer,...
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7118839 |
Electrophotographic organophotoreceptors with novel charge transport materials
An organophotoreceptor that includes:
(a) a charge transport compound having the formula
where n is an integer between 2 and 6, inclusive; R 1 is an aryl group; R 2 is a...
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7115346 |
Multi-layered electrophotographic positively charged organic photoconductor and manufacturing method thereof
A multi-layered electrophotographic positively charged organic photoconductor includes a conductive substrate, a charge transport layer formed on the conductive substrate, and a charge generating...
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7108948 |
Organophotoreceptor with charge transport compositions
An organophotoreceptor comprises an electrically conductive substrate and photoconductive element on the electrically conductive substrate, the photoconductive element having
a) a charge...
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7074532 |
Linked dihydrazone-based charge transport compounds
Improved organophotoreceptors comprise:
(a) a charge transport compound having the formula
where n is an integer from 0 to 1; X is an (N,N-disubstituted)arylamine group; Ar...
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7045263 |
Photoreceptor for electrophotography having a salt of an electron transport compound
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...
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7037632 |
Organophotoreceptor with charge transport material with fluorenone azine groups
Improved organophotoreceptor comprises an electrically conductive substrate and a photoconductive element on the electrically conductive substrate, the photoconductive element comprising:
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7011917 |
Organophotoreceptor with charge transport material having bis(9-fluorenone) azine groups
Improved organophotoreceptor comprises an electrically conductive substrate and a photoconductive element on the electrically conductive substrate, the photoconductive element comprising:
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7008743 |
Organophotoreceptor with charge transport material having a vinyl ether group
Improved organophotoreceptor comprises an electrically conductive substrate and a photoconductive element on the electrically conductive substrate, the photoconductive element comprising:
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6890693 |
Organophotoreceptor with an electron transport layer
Improved organophotoreceptor have an electrically conductive substrate, a charge generation layer comprising a charge generation compound and optionally a charge transport compound, and an overcoat...
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6861188 |
Electrophotographic photoreceptor, and image forming method, image forming apparatus and process cartridge therefor using the photoreceptor
Electrophotographic photoreceptor having a photosensitive layer containing an amino compound selected from formulae 1 to 22 in the specification.
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6835514 |
Hydrazone-based charge transport compounds
Improved organophotoreceptor include: (a) a charge transport compound having the formula where R 1 has a structure of: in which Ar is selected form the group consisting of; R 4 is a hydrogen...
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6835513 |
Carbazole based charge transport compounds
Improved organophotoreceptors have: (a) a charge transport compound having the formula: where R 1 is hydrogen, a branched or linear alkyl group, a branched or linear unsaturated hydrocarbon...
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6815132 |
Photoconductor materials based on new phase of titanyl phthalocyanine
A crystalline phase of titanyl oxyphthalocyanine, referred to herein as the S-phase, has an internal blend of lattice arrangements is provided by treatment of the gamma-form of titanyl...
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6768010 |
Organophotoreceptor with an epoxy-modified charge transport compound having an azine group
Organophotoreceptors comprise an electrically conductive substrate and a photoconductive element on the electrically conductive substrate, the photoconductive element comprising: a) a charge...
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6544702 |
Charge transport layers comprising hydrazones and photoconductors including the same
Charge transport layers comprise a hydrazone charge transport compound, Savinyl® yellow and an antioxidant. Dual layer photoconductors comprise the charge transport layer in combination with a...
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6432597 |
Electrophotographic photoconductor containing fluorenyl-azine derivatives and triarylamine in transport layer
Azine derivatives or their combinations with hindered phenol antioxidant in the charge transport layer containing one or more triarylamines or a combination of one triarylamine and one hydrazone...
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6379853 |
Electrophotographic imaging member having two charge transport layers for limiting toner consumption
An electrophotographic imaging member including a supporting substrate, an optional charge blocking layer, an optional adhesive layer, a charge generating layer, and a charge transporting element...
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6340548 |
Organophotoreceptors for electrophotography featuring novel charge transport compounds
Organic photoreceptors that include a charge transport compound, a charge generating compound, and an electroconductive support in which the charge transport compound is a novel aryl...
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6268095 |
Photoconductor for electrophotography
The present invention provides a new charge transport agent for use in a photosensitive layer in a positive-electrification-type electrophotographic photoconductor that can be used with high speed...
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6214503 |
Organophotoreceptors for electrophotography featuring novel charge transport compounds based upon hydroxy-functional compounds
The invention features organic photoreceptors that include a charge transport compound having the formula: ##STR1## where X is an N-alkyl-substituted carbazole, an N-aryl-substituted carbazole,...
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6022655 |
Photoreceptor for electrophotography, bishydrazone compound and intermediate thereof, and method for producing bishydrazone compound and intermediate thereof
A photoreceptor for electrophotography of the present invention includes a photosensitive layer provided on a conductive support, the photosensitive layer containing a bishydrazone compound...
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6004708 |
Electrophotographic photoconductor containing fluorenyl-azine derivatives as charge transport additives
A photoconductor for use in electrophotographic reproduction devices is disclosed. This photoconductor exhibits reduced room light and cycling fatigue without any corresponding negative impact on...
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6001523 |
Electrophotographic photoconductors
The invention described in the specification provides an improved coating for an electrophotographic photoconductor printing system. In particular, a blend of polycarbonate-A and polycarbonate-Z...
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5994010 |
Organic photoreceptor for electrophotography
An organic photoreceptor for electrophotography including a substrate which is electrically conductive; and an organic photosensitive layer which is formed on the substrate, which includes a...
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5958637 |
Electrophotographic photoreceptor and coating solution for production of charge transport layer
An electrophotographic photoreceptor comprising a conductive support and a photosensitive layer which comprises a charge generation layer containing a charge generation material and a charge...
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5945242 |
Electrophotographic photoreceptor containing hydrazone
Disclosed is an electrophotographic photoreceptor having a high sensitivity, a high endurance and a high stability against repeated use which comprises a conductive support with a light-sensitive...
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5925486 |
Imaging members with improved wear characteristics
Benzaldehyde-based hydrazone compounds of the formula ##STR1## wherein A represents a monocyclic or polycyclic divalent aromatic radical including at least one hydroxy-terminated substituent; R 1 ...
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5882813 |
Electrophotographic photoreceptor
An electrophotographic photoreceptor comprising a charge transporting material containing at least one triphenylamine compound represented by general formula (1) and at least one compound selected...
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5804345 |
Photoreceptor for electrophotography
An electrophotographic photoreceptor comprising a charge transport material and an anti-oxidant in the charge transport layer is disclosed. The transport material has a carbon atom of which the...
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5804343 |
Electrophotographic photoconductor
An electrophotographic photoconductor including an electroconductive support and a photoconductive layer formed thereon, which has at least a charge generation layer containing a charge generating...
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5736282 |
Electrophotographic photoreceptors including titanyloxyphthalocyanine crystals
An electrophotographic photoreceptor includes a conductive substrate and a photosensitive layer including a charge generation material and a charge transport material. The charge generation...
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5721081 |
Photoconductor for electrophotography with antioxidants
A photoconductor for electrophotography with excellent resistance against oxidation has a charge transport layer which contains at least two kinds of oxidants and at least one charge transport...
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5618646 |
Electrophotographic photoreceptors with anti-oxidizing agents
An electrophotographic photoreceptor has a conductive substrate and a photosensitive layer formed on the substrate. The photosensitive layer contains one compound which is selected from the group...
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5589309 |
Electrophotographic photoreceptor containing perylenes
Disclosed is an electrophotographic photoreceptor comprising a conductive support and provided thereon an intermediate layer, a carrier generation layer containing a carrier generation material and...
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5578405 |
Electrophotographic photoconductor containing disazo and trisazo pigments
An electrophotographic photoconductor includes an electroconductive support and a single-layered photoconductive layer formed thereon, containing a charge transporting material, a binder resin, and...
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5561017 |
Polyester polymer, production thereof and electrophotographic photoreceptor using the same
A polyester polymer comprising repeating units (I), or repeating units (I) and (II), and having a reduced viscosity (η sp/c) of 0.2 to 10.0 dl/g, measured at 20° C. as a 0.5 g/dl solution...
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5554473 |
Photoreceptor having charge transport layers containing a copolycarbonate and layer containing same
Organic photoconductive imaging receptors in which the charge transport layer contains, as a binder, a copolycarbonate of 1,1-bis-(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane and...
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5547791 |
Electrophotographic photoreceptor
An electrophotographic photoreceptor of the present invention comprises on a conductive support a photosensitive layer containing an arylamine hydrazone compound which has --O--A substituent on...
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5547790 |
Electrophotographic photoconductor containing polymeric charge transporting material in charge generating and transporting layers
An electrophotographic photoconductor including an electroconductive support and a photoconductive layer formed thereon, which has at least a charge generation layer containing a charge generating...
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5545499 |
Electrophotographic photoconductor having improved cycling stability and oil resistance
A photoconductor for use in electrophotographic reproduction devices is disclosed. This photoconductor exhibits improved oil resistance when used with liquid toners and excellent cycling stability....
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5521041 |
Polycarbonate, method of preparing the same and electrophotographic photoreceptor produced by using the same
A polycarbonate and a method of preparing the polycarbonate which comprises a repeating unit represented by the following general formula ##STR1## wherein each of R 1 and R 2 respectively is a...
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5518847 |
Organic photoconductor with polydivinyl spirobi (M-dioxane) polymer overcoating
An improved organic photoconductor is disclosed which comprises: (a) a conductive substrate; (b) a charge generation layer; (c) a charge transport layer; and (d) a reinforcing overcoating layer....
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5512400 |
Hydrazone compound and electrophotographic photoreceptor and organic electroluminescent element both containing the same
There are provided a hydrazone compound represented by formula (I), an electrophotographic photoreceptor which has a photosensitive layer containing the compound on an electrically conductive...
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5486439 |
Electrophotographic with polycarbonate having charge transporting group
An electrophotographic photosensitive member is constituted by disposing a photosensitive layer on an electroconductive support. The photosensitive layer is characterized by containing a specific...
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5453343 |
Hydrazone compounds as charge transport material in photoreceptors
Organic photoreceptors of the functionally separated laminated type containing a hydrazone compound in the charge transport layer thereof which provides low crystallinity and improved sensitivity,...
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5427879 |
electrophotographic photoreceptors
An electropotographic photoreceptor has a charge-transfer layer including at least two of charge-transfer materials, difference in oxidation potential between the charge-transfer materials being...
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