Electrophotographic element having 1,4-bis(azostyryl)-2,5 dimethoxy benzene compounds as photoconductors

Claim 2

An electrophotographic element which comprises an electrically conductive support and a photosensitive layer formed thereon, said photosensitive layer consisting essentially of a disazo compound having the formula ##STR6## wherein A is a member selected from the group consisting of ##STR7## is a fused ring selected from the group consisting of benzene ring, halobenzene ring, naphthalene ring, indole ring, carbazole ring and benzofuran ring; Ar 1 is a member selected from the group consisting of phenyl, naphthyl, dibenzofuryl, carbazolyl, substituted phenyl, substituted naphthyl, substituted dibenzofuryl and substituted carbazolyl wherein the substituents are selected from the group consisting of halogen, C 1 -C 4 alkoxy, dialkylamino wherein each alkyl has 1-4 carbon atoms, cyano, carboxyl, nitro and SO 3 Na; each of Ar 2 and Ar 3 is a member selected from the group consisting of phenyl, naphthyl, substituted phenyl and substituted naphthyl wherein the substituents are selected from the group consisting of nitro, SO 3 NH 2 , SO 3 H, halogen, C 1 -C 4 alkyl, C 1 -C 14 alkoxy, cyano, dialkylamino wherein each alkyl has 1-4 carbon atoms and acylamino having 1-4 carbon atoms; each of R 1 and R 3 is a member selected from the group consisting of hydrogen, alkyl having 1-4 carbon atoms, phenyl and halophenyl; and R 2 is a member selected from the group consisting of alkyl having 1-4 carbon atoms, carboxyl and esters thereof wherein the ester-forming group has 1-4 carbon atoms; and a resin binder.

Claim 3

An electrophotographic element according to claim 1 wherein the thickness of said photosensitive layer is in the range of from about 3μ to about 50μ.

Claim 4

An electrophotographic element according to claim 1 wherein the amount of said disazo compound is in the range of from about 30 wt.% to about 70 wt.% relative to the photosensitive layer.

Claim 5

An electrophotographic element according to claim 1 wherein A is ##STR8##

Claim 6

An electrophotographic element according to claim 1 wherein A is ##STR9##

Claim 7

An electrophotographic element according to claim 1 wherein A is ##STR10##

Claim 8

An electrophotographic element according to claim 1 wherein the disazo compound is ##STR11##

Claim 9

An electrophotographic element according to claim 1 wherein the disazo compound is ##STR12##

Claim 10

An electrophotographic element according to claim 1 wherein the disazo compound is ##STR13##

Claim 11

An electrophotographic element according to claim 1 wherein the disazo compound is ##STR14##

Claim 12

An electrophotographic element according to claim 1 wherein the compound expressed by the aforesaid formula is ##STR15##

Claim 13

An electrophotographic element according to claim 1 wherein the disazo compound is ##STR16##

Claim 14

An electrophotographic element according to claim 1 wherein the disazo compound is ##STR17##

Claim 15

An electrophotographic element according to claim 1 wherein the disazo compound is ##STR18##

Claim 16

An electrophotographic element according to claim 1 wherein the disazo compound is ##STR19##

Claim 17

An electrophotographic element according to claim 1 wherein the disazo compound is ##STR20##

Claim 18

An electrophotographic element which comprises an electrically conductive support and a photosensitive layer formed thereon, said photosensitive layer consisting essentially of a disazo compound having the formula ##STR21## wherein A is a member selected from the group consisting of ##STR22## is a fused ring selected from the group consisting of benzene ring, halobenzene ring, naphthalene ring, indole ring, carbazole ring and benzofuran ring; Ar 1 is a member selected from the group consisting of phenyl, naphthyl, dibenzofuryl, carbazolyl, substituted phenyl, substituted naphthyl, substituted dibenzofuryl and substituted carbazolyl wherein the substituents are selected from the group consisting of halogen, C 1 -C 4 alkoxy, dialkylamino wherein each alkyl has 1-4 carbon atoms, cyano, carboxyl, nitro and SO 3 Na; each of Ar 2 and Ar 3 is a member selected from the group consisting of phenyl, naphthyl, substituted phenyl and substituted naphthyl wherein the substituents are selected from the group consisting of nitro, SO 3 NH 2 , SO 3 H, halogen, C 1 -C 4 alkyl, C 1 -C 14 alkoxy, cyano, dialkylamino wherein each alkyl has 1-4 carbon atoms and acylamino having 1-4 carbon atoms; each of R 1 and R 3 is a member selected from the group consisting of hydrogen, alkyl having 1-4 carbon atoms, phenyl and halophenyl; and R 2 is a member selected from the group consisting of alkyl having 1-4 carbon atoms, carboxyl and esters thereof wherein the ester-forming group has 1-4 carbon atoms; a charge-transfer substance and a resinous binder.

Claim 19

An electrophotographic element which comprises an electrically conductive support and a photosensitive layer formed thereon, said photosensitive layer consisting essentially of a disazo compound having the formula ##STR21## wherein A is a member selected from the group consisting of ##STR22## is a fused ring selected from the group consisting of benzene ring, halobenzene ring, naphthalene ring, indole ring, carbazole ring and benzofuran ring; Ar 1 is a member selected from the group consisting of phenyl, naphthyl, dibenzofuryl, carbazolyl, substituted phenyl, substituted naphthyl, substituted dibenzofuryl and substituted carbazolyl wherein the substituents are selected from the group consisting of halogen, C 1 -C 4 alkoxy, dialkylamino wherein each alkyl has 1-4 carbon atoms, cyano, carboxyl, nitro and SO 3 Na; each of Ar 2 and Ar 3 is a member selected from the group consisting of phenyl, naphthyl, substituted phenyl and substituted naphthyl wherein the substituents are selected from the group consisting of nitro, SO 3 NH 2 , SO 3 H, halogen, C 1 -C 4 alkyl, C 1 -C 14 alkoxy, cyano, dialkylamino wherein each alkyl has 1-4 carbon atoms and acylamino having 1-4 carbon atoms; each of R 1 and R 3 is a member selected from the group consisting of hydrogen, alkyl having 1-4 carbon atoms, phenyl and halophenyl; and R 2 is a member selected from the group consisting of alkyl having 1-4 carbon atoms, carboxyl and esters thereof wherein the ester-forming group has 1-4 carbon atoms; a charge-transfer substance and a resinous binder.

Claim 20

An electrophotographic element according to claim 17 wherein the thickness of said photosensitive layer is in the range of from about 3μ to about 50μ.

Claim 21

An electrophotographic element according to claim 17 wherein the amount of said disazo compound is in the range of from about 1 wt.% to about 50 wt.% relative to the photosensitive layer and the amount of said charge transfer substance is in the range of from about 10 wt.% to about 95 wt.% relative to the photosensitive layer.

Claim 22

An electrophotographic element according to claim 17 wherein A is ##STR23##

Claim 23

An electrophotographic element according to claim 17 wherein A is ##STR24##

Claim 24

An electrophotographic element according to claim 17 wherein A is ##STR25##

Claim 25

An electrophotographic element according to claim 17 wherein the disazo compound is ##STR26##

Claim 26

An electrophotographic element according to claim 17 wherein the disazo compound is ##STR27##

Claim 27

An electrophotographic element according to claim 17 wherein the disazo compound is ##STR28##

Claim 28

An electrophotographic element according to claim 17 wherein the disazo compound is ##STR29##

Claim 29

An electrophotographic element according to claim 17 wherein the disazo compound is ##STR30##

Claim 30

An electrophotographic element according to claim 17 wherein the disazo compound is ##STR31##

Claim 31

An electrophotographic element according to claim 17 wherein the disazo compound is ##STR32##

Claim 32

An electrophotographic element according to claim 17 wherein the disazo compound is ##STR33##

Claim 33

An electrophotographic element according to claim 17 wherein the disazo compound is ##STR34##

Claim 34

An electrophotographic element according to claim 17 wherein the disazo compound is ##STR35##

Claim 35

An electrophotographic element according to claim 17 wherein the disazo compound is ##STR36##

Claim 36

An electrophotographic element according to claim 17 wherein the disazo compound is ##STR37##

Claim 37

An electrophotographic element according to claim 17 wherein the disazo compound is ##STR38##

Claim 38

An electrophotographic element according to claim 17 wherein the disazo compound is ##STR39##

Claim 39

An electrophotographic element according to claim 17 wherein the disazo compound is ##STR40##

Claim 40

An electrophotographic element according to claim 17 wherein the disazo compound is ##STR41##

Claim 41

An electrophotographic element according to claim 17 wherein the disazo compound is ##STR42##

Claim 42

An electrophotographic element according to claim 17 wherein the disazo compound is ##STR43##

Claim 43

An electrophotographic element according to claim 17 wherein the disazo compound is ##STR44##

Claim 44

An electrophotographic element according to claim 17 wherein the disazo compound is ##STR45##

Claim 45

An electrophotographic element according to claim 17 wherein the disazo compound is ##STR46##

Claim 46

An electrophotographic element according to claim 17 wherein the disazo compound is ##STR47##

Claim 47

An electrophotographic element according to claim 17 wherein the disazo compound is ##STR48##

Claim 48

An electrophotographic element according to claim 17 wherein the disazo comound is ##STR49##

Claim 49

An electrophotographic element according to claim 17 wherein the disazo compound is ##STR50##

Claim 50

An electrophotographic element which comprises an electrically conductive support, a charge generating layer on said electrically conductive support, said charge generating layer consisting essentially of a disazo compound having the formula ##STR51## wherein A is a member selected from the group consisting of ##STR52## is a fused ring selected from the group consisting of benzene ring, halobenzene ring, naphthalene ring, indole ring, carbazole ring and benzofuran ring; Ar 1 is a member selected from the group consisting of phenyl, naphthyl, dibenzofuryl, carbazolyl, substituted phenyl, substituted naphthyl, substituted dibenzofuryl and substituted carbazolyl wherein the substituents are selected from the group consisting of halogen, C 1 -C 4 alkoxy, dialkylamino wherein each alkyl has 1-4 carbon atoms, cyano, carboxyl, nitro and SO 3 Na; each of Ar 2 and Ar 3 is a member selected from the group consisting of phenyl, naphthyl, substituted phenyl and substituted naphthyl wherein the substituents are selected from the group consisting of nitro, SO 3 NH 2 , SO 3 H, halogen, C 1 -C 4 alkyl, C 1 -C 4 alkoxy, cyano, dialkylamino wherein each alkyl has 1-4 carbon atoms and acylamino having 1-4 carbon atoms; each of R 1 and R 3 is a member selected from the group consisting of hydrogen, alkyl having 1-4 carbon atoms, phenyl and halophenyl; and R 2 is a member selected from the group consisting of alkyl having 1-4 carbon atoms, carboxyl and esters thereof wherein the ester-forming group has 1-4 carbon atoms; and a charge transfer layer on said charge generating layer, said charge transfer layer consisting essentially of a charge transfer substance and a resinous binder.

Claim 51

An electrophotographic element which comprises an electrically conductive support, a charge generating layer on said electrically conductive support, said charge generating layer consisting essentially of a disazo compound having the formula ##STR51## wherein A is a member selected from the group consisting of ##STR52## is a fused ring selected from the group consisting of benzene ring, halobenzene ring, naphthalene ring, indole ring, carbazole ring and benzofuran ring; Ar 1 is a member selected from the group consisting of phenyl, naphthyl, dibenzofuryl, carbazolyl, substituted phenyl, substituted naphthyl, substituted dibenzofuryl and substituted carbazolyl wherein the substituents are selected from the group consisting of halogen, C 1 -C 4 alkoxy, dialkylamino wherein each alkyl has 1-4 carbon atoms, cyano, carboxyl, nitro and SO 3 Na; each of Ar 2 and Ar 3 is a member selected from the group consisting of phenyl, naphthyl, substituted phenyl and substituted naphthyl wherein the substituents are selected from the group consisting of nitro, SO 3 NH 2 , SO 3 H, halogen, C 1 -C 4 alkyl, C 1 -C 4 alkoxy, cyano, dialkylamino wherein each alkyl has 1-4 carbon atoms and acylamino having 1-4 carbon atoms; each of R 1 and R 3 is a member selected from the group consisting of hydrogen, alkyl having 1-4 carbon atoms, phenyl and halophenyl; and R 2 is a member selected from the group consisting of alkyl having 1-4 carbon atoms, carboxyl and esters thereof wherein the ester-forming group has 1-4 carbon atoms; and a charge transfer layer on said charge generating layer, said charge transfer layer consisting essentially of a charge transfer substance and a resinous binder.

Claim 52

An electrophotographic element according to claim 48 wherein the thickness of said charge generating layer is in the range of from about 0.01μ to about 5μ, and the thickness of said charge transfer layer is in the range of from about 3μ to about 50μ.

Claim 53

An electrophotographic element according to claim 48 wherein the thickness of said charge generating layer is in the range of from about 0.03μ to about 2μ, and the thickness of said charge transfer layer is in the range of from about 5μ to about 20μ.

Claim 54

An electrophotographic element according to claim 48 wherein the amount of said charge transfer substance is in the range of from about 10 wt.% to 95 wt.% relative to the charge transfer layer.

Claim 55

An electrophotographic element according to claim 48 wherein A is ##STR53##

Claim 56

An electrophotographic element according to claim 48 wherein A is ##STR54##

Claim 57

An electrophotographic element according to claim 48 wherein A is ##STR55##

Claim 58

An electrophotographic element according to claim 48 wherein the disazo compound is ##STR56##

Claim 59

An electrophotographic element according to claim 48 wherein the diaza compound is ##STR57##

Claim 60

An electrophotographic element according to claim 48 wherein the disazo compound is ##STR58##

Claim 61

An electrophotographic element according to claim 48 wherein the disazo compound is ##STR59##

Claim 62

An electrophotographic element according to claim 48 wherein the disazo compound is ##STR60##

Claim 63

An electrophotographic element according to claim 48 wherein the disazo compound is ##STR61##

Claim 64

An electrophotographic element according to claim 48 wherein the disazo compound is ##STR62##

Claim 65

An electrophotographic element according to claim 48 wherein the disazo compound is ##STR63##

Claim 66

An electrophotographic element according to claim 48 wherein the disazo compound is ##STR64##

Claim 67

An electrophotographic element according to claim 48 wherein the disazo compound is ##STR65##

Claim 68

An electrophotographic element according to claim 48 wherein the disazo compound is ##STR66##

Claim 69

An electrophotographic element according to claim 48 wherein the disazo compound is ##STR67##

Claim 70

An electrophotographic element according to claim 48 wherein the disazo compound is ##STR68##

Claim 71

An electrophotographic element according to claim 48 wherein the disazo compound is ##STR69##

Claim 72

An electrophotographic element according to claim 48 wherein the disazo compound is ##STR70##

Claim 73

A electrophotographic element according to claim 48 wherein the disazo compound is ##STR71##