US4314016A — Electrophotographic element having a bisazo photo…

Claim 1

Independent Claim 127 words

An electrophotographic element comprising; an electrically conductive layer; a charge generation layer on the electrically conductive layer, the charge generation layer having a thickness of from 0.01μ to 5μ and comprising particles of disazo pigment having a particle size of 5μ or less, said disazo pigment having the formula; ##STR7## wherein R 1 is hydrogen, chlorine, bromine, methyl, ethyl, methoxy, ethoxy, nitro, dimethylamino, diethylamino or phenyl; m and n are each an integer of 1 or 2 and the R 1 groups are the same or different when m and n are 2; and R 2 is hydrogen or chlorine; and a charge transport layer adjacent the charge generation layer, the charge transport layer having a thickness of from 3μ to 50μ and comprising a polymeric binder.

Claim 2

Dependent Claim 127 words

An electrophotographic element comprising; an electrically conductive layer; a charge generation layer on the electrically conductive layer, the charge generation layer having a thickness of from 0.01μ to 5μ and comprising particles of disazo pigment having a particle size of 5μ or less, said disazo pigment having the formula; ##STR7## wherein R 1 is hydrogen, chlorine, bromine, methyl, ethyl, methoxy, ethoxy, nitro, dimethylamino, diethylamino or phenyl; m and n are each an integer of 1 or 2 and the R 1 groups are the same or different when m and n are 2; and R 2 is hydrogen or chlorine; and a charge transport layer adjacent the charge generation layer, the charge transport layer having a thickness of from 3μ to 50μ and comprising a polymeric binder.

Claim 3

Dependent Claim 26 words

An electrophotographic element as set forth in claim 1 in which the charge generation layer comprises a disazo pigment selected from the group consisting of ##STR8##

Claim 4

Dependent Claim 25 words

An electrophotographic element set forth in claim 1 in which the charge generation layer comprises a disazo pigment selected from the group consisting of ##STR9##

Claim 5

Dependent Claim 39 words

An electrophotographic element as set forth in claim 1 in which the charge generation layer is positioned between the electrically conductive layer and the charge transport layer, the charge transport layer forming an exposed surface of the electrophotographic element.

Claim 6

Dependent Claim 29 words

An electrophotographic element as set forth in claim 1 in which the charge transport layer comprises a compound selected from the group consisting of 9-(4-diethylaminostyryl)anthracene, 1,1-bis(4-dibenzylaminophenyl)propane, 1-phenyl-3-(4-diethylaminostyryl)-5-(4-diethylaminophenyl)pyrazoline and 9-ethyl-3-carbazolealdehyde-1-methyl-1-phenylhydrazone.

Claim 7

Dependent Claim 33 words

An electrophotographic element as set forth in claim 1 in which the polymeric binder is selected from the group consisting of polycarbonate resins, polystyrene, polyester resins, polyvinyl acetal, polyacrylates, polymethylmethacrylate and mixtures thereof.

Claim 8

Dependent Claim 42 words

An electrophotographic element as set forth in claim 1 in which said charge generation layer contains from 30 to 100% by weight of said disazo pigment and said charge transfer layer contains from 10 to 95% by weight of charge transport material.

Claim 9

Dependent Claim 156 words

An electrophotographic element comprising, in successive layers; an electrically conductive substrate; a charge generation layer responsive to actinic radiation of a wave length shorter than 6000 angstroms to generate an electronhole pair, the charge generation layer having a thickness of from 0.01μ to 5μ and being comprised of particles of a disazo pigment having a particle size of 5μ or less, said disazo pigment having the formula; ##STR10## wherein R 1 is hydrogen, chlorine, bromine, methyl, ethyl, methoxy, ethoxy, nitro, dimethylamino, diethylamino or phenyl; m and n are each an integer of 1 or 2 and the R 1 groups are the same or different when m and n are 2; and R 2 is hydrogen or chlorine; and a charge transport layer having a thickness of from 3μ to 50μ, the charge transport layer comprising a charge transport material selected from the group consisting of 9-(4-diethylaminostyryl) anthracene, 1,1-bis(4-dibenzylaminophenyl)propane, 1-phenyl-3-(4-diethylaminostyryl)-5-(4-diethylaminophenyl)pyrazoline and 9-ethyl-3-carbazolealdehyde-1-methyl-1-phenylhydrazone and a polymeric binder.

Claim 10

Dependent Claim 156 words

An electrophotographic element comprising, in successive layers; an electrically conductive substrate; a charge generation layer responsive to actinic radiation of a wave length shorter than 6000 angstroms to generate an electronhole pair, the charge generation layer having a thickness of from 0.01μ to 5μ and being comprised of particles of a disazo pigment having a particle size of 5μ or less, said disazo pigment having the formula; ##STR10## wherein R 1 is hydrogen, chlorine, bromine, methyl, ethyl, methoxy, ethoxy, nitro, dimethylamino, diethylamino or phenyl; m and n are each an integer of 1 or 2 and the R 1 groups are the same or different when m and n are 2; and R 2 is hydrogen or chlorine; and a charge transport layer having a thickness of from 3μ to 50μ, the charge transport layer comprising a charge transport material selected from the group consisting of 9-(4-diethylaminostyryl) anthracene, 1,1-bis(4-dibenzylaminophenyl)propane, 1-phenyl-3-(4-diethylaminostyryl)-5-(4-diethylaminophenyl)pyrazoline and 9-ethyl-3-carbazolealdehyde-1-methyl-1-phenylhydrazone and a polymeric binder.

Claim 11

Dependent Claim 25 words

An electrophotographic element set forth in claim 8 in which the charge generation layer comprises a disazo pigment selected from the group consisting of ##STR11##

Claim 12

Dependent Claim 25 words

An electrophotographic element set forth in claim 8 in which the charge generation layer comprises a disazo pigment selected from the group consisting of ##STR12##

Claim 13

Dependent Claim 33 words

An electrophotographic element as set forth in claim 8 in which the polymeric binder is selected from the group consisting of polycarbonate resins, polystyrene, polyester resins, polyvinyl acetal, polyacrylates, polymethylmethacrylate and mixtures thereof.

Claim 14

Dependent Claim 42 words

An electrophotographic element as set forth in claim 8 in which said charge generation layer contains from 30 to 100% by weight of said disazo pigment and said charge transfer layer contains from 10 to 95% by weight of said charge transport.

Claim 15

Dependent Claim 109 words

An electrophotographic element comprising; an electrically conductive layer; and a photosensitive layer on the electrically conductive layer, the photosensitive layer having a thickness of from 3μ to 50μ and comprising particles of a disazo pigment, a charge transport material and a polymeric binder, said disazo pigment having a particle size of 5μ or less and having the formula; ##STR13## wherein R 1 is hydrogen, chlorine, bromine, methyl, ethyl, methoxy, ethoxy, nitro, dimethylamino, diethylamino or phenyl; m and n are each an integer of 1 or 2 and the R 1 groups are the same or different when m and n are 2; and R 2 is hydrogen or chlorine.

Claim 16

Dependent Claim 109 words

An electrophotographic element comprising; an electrically conductive layer; and a photosensitive layer on the electrically conductive layer, the photosensitive layer having a thickness of from 3μ to 50μ and comprising particles of a disazo pigment, a charge transport material and a polymeric binder, said disazo pigment having a particle size of 5μ or less and having the formula; ##STR13## wherein R 1 is hydrogen, chlorine, bromine, methyl, ethyl, methoxy, ethoxy, nitro, dimethylamino, diethylamino or phenyl; m and n are each an integer of 1 or 2 and the R 1 groups are the same or different when m and n are 2; and R 2 is hydrogen or chlorine.

Claim 17

Dependent Claim 27 words

An electrophotographic element as set forth in claim 13 in which the disazo pigment contained in the photosensitive layer is selected from the group consisting of ##STR14##

Claim 18

Dependent Claim 26 words

An electrophotographic element set forth in claim 13 in which the disazo pigment contained in the photosensitive layer is selected from the group consisting of ##STR15##

Claim 19

Dependent Claim 24 words

An electrophotographic element as set forth in claim 13 in which the photosensitive layer is of a thickness between 5 microns to 20 microns.

Claim 20

Dependent Claim 35 words

An electrophotographic element as set forth in claim 13 in which the charge transport material contained in the photosensitive layer comprises a compound selected from the group consisting of 9-(4-diethylaminostyryl)anthracene, 1,1-bis(4-dibenzylaminophenyl) propane, 1-phenyl-3-(4-diethylaminostyryl)-5-(4-diethylaminophenyl)pyrazoline and 9-ethyl-3-carbazolealdehyde-1-methyl-1-phenylhydrazone.

Claim 21

Dependent Claim 33 words

An electrophotographic element as set forth in claim 13 in which the polymeric binder is selected from the group consisting of polycarbonate resins, polystyrene, polyester resins, polyvinyl acetal, polyacrylates, polyethylmethacrylate and mixtures thereof.

Claim 22

Dependent Claim 37 words

An electrophotographic element as set forth in claim 13 in which said photosensitive layer contains from 0.1 to 50% by weight of said disazo pigment and from 30 to 90% by weight of said charge transport material.

Claim 23

Dependent Claim 141 words

An electrophotographic element comprising; an electrically conductive substrate; and a photosensitive layer responsive to actinic radiation of a wave length shorter than 6000 angstroms to generate an electronhole pair; said photosensitive layer having a thickness of from 3μ to 50μ and being comprised of particles of a disazo pigment, a charge transport material and a polymeric binder, the disazo pigment having a particle size of 5μ or less and having the formula; ##STR16## wherein R 1 is hydrogen, chlorine, bromine, methyl, ethyl, methoxy, ethoxy, nitro, dimethylamino, diethylamino or phenyl; m and n are each an integer of 1 or 2 and the R 1 groups are the same or different when m and n are 2; and R 2 is hydrogen or chlorine, the charge transport material being a member selected from the group consisting of 9-(4-diethylaminostyryl)anthracene, 1,1-bis-(4-dibenzylaminophenyl)propane, 1-phenyl-3-(4-diethylaminostyryl-5-(4-diethylaminophenyl)pyrazoline and 9-ethyl-3-carbazolealdehyde-1-methyl-1-phenylhydrazone.

Claim 24

Dependent Claim 141 words

An electrophotographic element comprising; an electrically conductive substrate; and a photosensitive layer responsive to actinic radiation of a wave length shorter than 6000 angstroms to generate an electronhole pair; said photosensitive layer having a thickness of from 3μ to 50μ and being comprised of particles of a disazo pigment, a charge transport material and a polymeric binder, the disazo pigment having a particle size of 5μ or less and having the formula; ##STR16## wherein R 1 is hydrogen, chlorine, bromine, methyl, ethyl, methoxy, ethoxy, nitro, dimethylamino, diethylamino or phenyl; m and n are each an integer of 1 or 2 and the R 1 groups are the same or different when m and n are 2; and R 2 is hydrogen or chlorine, the charge transport material being a member selected from the group consisting of 9-(4-diethylaminostyryl)anthracene, 1,1-bis-(4-dibenzylaminophenyl)propane, 1-phenyl-3-(4-diethylaminostyryl-5-(4-diethylaminophenyl)pyrazoline and 9-ethyl-3-carbazolealdehyde-1-methyl-1-phenylhydrazone.

Claim 25

Dependent Claim 25 words

An electrophotographic element set forth in claim 20 in which the charge generation material is a disazo pigment selected from the group consisting of ##STR17##

Claim 26

Dependent Claim 22 words

An electrophotographic element set forth in claim 20 in which the charge generation material is selected from the group consisting of ##STR18##

Claim 27

Dependent Claim 33 words

An electrophotographic element as set forth in claim 20 in which the polymeric binder is selected from the group consisting of polycarbonate resins, polystyrene, polyester resins, polyvinyl acetal, polyacrylates, polymethylmethacrylate and mixtures thereof.

Claim 28

Dependent Claim 37 words

An electrophotographic element as set forth in claim 20 in which said photosensitive layer contains from 0.1 to 50% by weight of said disazo pigment and from 30 to 90% by weight of said charge transport material.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1985-02-01	1985-08-03	1986-02-02	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1989-02-01	1989-08-03	1990-02-02	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1993-02-01	1993-08-03	1994-02-02	$7700.00	Window Closed / Lapsed

Electrophotographic element having a bisazo photoconductor

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