US4352876A
Expired / Lapsed
US
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Complex type electrophotographic plate and electrophotographic method using the same
Assignee: Hitachi Ltd
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Filing: 1980-09-12
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Granted: 1982-10-05
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Expires: 2000-09-12
Abstract
Abstract A complex type electrophotographic plate comprising an electroconductive support and a charge generating layer and a charge transport layer characterized in that the charge generating layer contains at least a copper phthalocyanine and the charge transport layer contains at least a trinitrofluorenone, has excellent photosensitivity and adhesion to the support. There is also provided an electrophotographic method comprising a first step of charging an electrophotographic plate, a second step of exposing the electrophotographic plate to light and a third step of developing an electrostatic latent image formed on the electrophotographic plate directly or the electrostatic latent image transferred to a recording medium, characterized by using in the first step, as the electrophotographic plate, a complex type electrophotographic plate having a charge generating layer containing at least a copper phthalocyanine and a charge transport layer containing at least a nitrofluorenone and charging said electrophotographic plate positively with excellent recording properties.
Inventors
- 👤 Shigeo Suzuki
- 👤 Atsushi Kakuta
- 👤 Hiroyuki Oka
- 👤 Yasuki Mori
- 👤 Hirosada Morishita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:54
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/043; G03G5/047; G03G5/06; G03G5/0601; G03G5/0618; G03G5/0664; G03G5/0675; G03G5/0677; G03G5/0679; G03G5/0696; G03G5/07; G03G5/071; Y; Y10; Y10S; Y10S430/00; Y10S430/001; Y10S430/10
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
127 words
In a complex type electrophotographic plate comprising an electroconductive support and a photosensitive material layer containing a charge generating layer and a charge transport layer formed on the electroconductive support, the improvement wherein the charge generating layer contains a copper phthalocyanine and the charge transport layer contains (a) a nitrofluorenone and (b) at least one polycyclic aromatic vinyl polymer selected from the group consisting of a homopolymer of a polyacrylic aromatic vinyl compound, a copolymer of said polycyclic aromatic vinyl compound and one or more other vinyl compounds, a brominated homopolymer of said polycyclic aromatic vinyl compound and a brominated copolymer of said polycyclic aromatic vinyl compound and one or more of said other vinyl compounds, said polycyclic aromatic vinyl compound being represented by the formula: ##STR11##
Claim 2
Dependent Claim
127 words
In a complex type electrophotographic plate comprising an electroconductive support and a photosensitive material layer containing a charge generating layer and a charge transport layer formed on the electroconductive support, the improvement wherein the charge generating layer contains a copper phthalocyanine and the charge transport layer contains (a) a nitrofluorenone and (b) at least one polycyclic aromatic vinyl polymer selected from the group consisting of a homopolymer of a polyacrylic aromatic vinyl compound, a copolymer of said polycyclic aromatic vinyl compound and one or more other vinyl compounds, a brominated homopolymer of said polycyclic aromatic vinyl compound and a brominated copolymer of said polycyclic aromatic vinyl compound and one or more of said other vinyl compounds, said polycyclic aromatic vinyl compound being represented by the formula: ##STR11##
Claim 3
Dependent Claim
25 words
A complex type electrophotographic plate according to claim 1, wherein the charge generating layer contains ε-form copper phthalocyanine and the charge transport layer contains 2,4,7-trinitrofluorenone.
Claim 4
Dependent Claim
27 words
A complex type electrophotographic plate according to claim 1, wherein at least one of the charge generating layer and the charge transport layer contains a resin binder.
Claim 5
Dependent Claim
55 words
A complex type electrophotographic plate according to claim 1, wherein the charge generating layer contains ε-form copper phthalocyanine and the charge transport layer contains (a) 2,4,7-trinitrofluorenone and (b) at least one polycyclic aromatic vinyl polymer selected from the group consisting of 9-(p-vinylphenyl)anthracene homopolymer, 9-(p-vinylphenyl)anthracene-N-vinyl carbazole copolymer, 9-(p-vinylphenyl)anthracene-styrene copolymer, 9-(p-vinylphenyl)anthracene-acrylonitrile copolymer, 9-(p-vinylphenyl)anthracene-acrylate copolymers and 9-(p-vinylphenyl)anthracene-methacrylate copolymers.
Claim 6
Dependent Claim
37 words
A complex type electrophotographic plate according to claim 1 or 4, wherein the thickness of the charge generating layer is 0.1 to 5 μm and the thickness of the charge transport layer is 3 to 100 μm.
Claim 7
Dependent Claim
34 words
A complex type electrophotographic plate according to claim 5, wherein the polycyclic aromatic vinyl polymer is used in an amount of 0.3 to 10 parts by weight per part by weight of the nitrofluorenone.
Claim 8
Dependent Claim
27 words
A complex type electrophotographic plate according to claim 6, wherein at least one of the charge generating layer and the charge transport layer contains a resin binder.
Claim 9
Dependent Claim
64 words
A complex type electrophotographic plate according to claim 1, wherein the charge generating layer contains (c) ε-form copper phthalocyanine and (d) at least one azo pigment selected from the azo pigments of the formulae: ##STR12## wherein M is Ca, Ba, or Mg; and R 1 and R 2 are independently hydrogen, --OCH 3 or halogen, and ##STR13## wherein X is --OCH 3 or Cl.
Claim 10
Dependent Claim
35 words
A complex type electrophotographic plate according to claim 8, wherein the thickness of the charge generating layer is 0.1 to 5 μm and the thickness of the charge transport layer is 3 to 100 μm.
Claim 11
Dependent Claim
33 words
A complex type electrophotographic plate according to claim 9, wherein the azo pigment is used in an amount of 0.1 to 10 parts by weight per part by weight of the copper phthalocyanine.
Claim 12
Dependent Claim
27 words
A complex type electrophotographic plate according to claim 10, wherein at least one of the charge generating layer and the charge transport layer contains a resin binder.
Claim 13
Dependent Claim
147 words
In a complex type electrophotographic plate comprising an electroconductive support and a photosensitive material layer containing a charge generating layer and a charge transport layer formed on the electroconductive support, the improvement wherein the charge generating layer contains (c) a copper phthalocyanine and (d) at least one azo pigment selected from the group consisting of monoazo lake pigments and disazo pigments, and the charge transport layer contains (a) a nitrofluorenone and (b) at least one polycyclic aromatic vinyl polymer selected from the group consisting of a homopolymer of a polycyclic aromatic vinyl compound, a copolymer of said polycyclic aromatic vinyl compound and one or more other vinyl compounds, a brominated homopolymer of said polycyclic aromatic vinyl compound and a brominated copolymer of said polycyclic aromatic vinyl compound and one or more of said other vinyl compounds, said polycyclic aromatic vinyl compound being represented by the formula: ##STR14##
Claim 14
Dependent Claim
147 words
In a complex type electrophotographic plate comprising an electroconductive support and a photosensitive material layer containing a charge generating layer and a charge transport layer formed on the electroconductive support, the improvement wherein the charge generating layer contains (c) a copper phthalocyanine and (d) at least one azo pigment selected from the group consisting of monoazo lake pigments and disazo pigments, and the charge transport layer contains (a) a nitrofluorenone and (b) at least one polycyclic aromatic vinyl polymer selected from the group consisting of a homopolymer of a polycyclic aromatic vinyl compound, a copolymer of said polycyclic aromatic vinyl compound and one or more other vinyl compounds, a brominated homopolymer of said polycyclic aromatic vinyl compound and a brominated copolymer of said polycyclic aromatic vinyl compound and one or more of said other vinyl compounds, said polycyclic aromatic vinyl compound being represented by the formula: ##STR14##
Claim 15
Dependent Claim
101 words
A complex type electrophotographic plate according to claim 12, wherein the charge generating layer contains (c) ε-form copper phthalocyanine and (d) at least one azo pigment selected from the azo pigments of the formulae: ##STR15## wherein M is Ca, Ba or Mg; and R 1 and R 2 are independently hydrogen, --OCH 3 or halogen, and ##STR16## wherein X is --OCH 3 or Cl, and the charge transport layer contains (a) 2,4,7-trinitrofluorenone and (b) at least one polycyclic aromatic vinyl polymer selected from the group consisting of 9-(p-vinylphenyl)anthracene homopolymer, 9-(p-vinylphenyl)anthracene-N-vinyl carbazole copolymer, 9-(p-vinylphenyl)anthracene-styrene copolymer, 9-(p-vinylphenyl)anthracene-acrylonitrile copolymer, 9-(p-vinylphenyl)anthracene-acrylate copolymers and 9-(p-vinylphenyl)anthracene-methacrylate copolymers.
Claim 16
Dependent Claim
37 words
A complex type electrophotographic plate according to claim 12 or 13, wherein the thickness of the charge generating layer is 0.1 to 5 μm and the thickness of the charge transport layer is 3 to 100 μm.
Claim 17
Dependent Claim
58 words
A complex type electrophotographic plate according to claim 14, wherein the azo pigment is used in an amount of 0.1 to 10 parts by weight per part by weight of the copper phthalocyanine and the polycyclic aromatic vinyl polymer is used in an amount of 0.3 to 10 parts by weight per part by weight of the nitrofluorenone.
Claim 18
Dependent Claim
27 words
A complex type electrophotographic plate according to claim 15, wherein at least one of the charge generating layer and the charge transport layer contains a resin binder.
Claim 19
Dependent Claim
168 words
In an electrophotographic method comprising a first step of charging an electrophotographic plate, a second step of exposing the electrophotographic plate to light and a third step of developing an electrostatic latent image formed on the electrophotographic plate directly or the electrostatic latent image transferred to a recording medium, the improvement which comprises using in the first step, as the electrophotographic plate, a complex type electrophotographic plate having a charge generating layer containing a copper phthalocyanine and a charge transport layer containing (a) a nitrofluorenone and (b) at least one polycyclic aromatic vinyl polymer selected from the group consisting of a homopolymer of a polycyclic aromatic vinyl compound, a copolymer of said polycyclic aromatic vinyl compound and one or more other vinyl compounds, a brominated homopolymer of said polycyclic aromatic vinyl compound and a brominated copolymer of said polycyclic aromatic vinyl compound and one or more of said other vinyl compounds, said polycyclic aromatic vinyl compound being represented by the formula: ##STR17## and charging said electrophotographic plate positively.
Claim 20
Dependent Claim
168 words
In an electrophotographic method comprising a first step of charging an electrophotographic plate, a second step of exposing the electrophotographic plate to light and a third step of developing an electrostatic latent image formed on the electrophotographic plate directly or the electrostatic latent image transferred to a recording medium, the improvement which comprises using in the first step, as the electrophotographic plate, a complex type electrophotographic plate having a charge generating layer containing a copper phthalocyanine and a charge transport layer containing (a) a nitrofluorenone and (b) at least one polycyclic aromatic vinyl polymer selected from the group consisting of a homopolymer of a polycyclic aromatic vinyl compound, a copolymer of said polycyclic aromatic vinyl compound and one or more other vinyl compounds, a brominated homopolymer of said polycyclic aromatic vinyl compound and a brominated copolymer of said polycyclic aromatic vinyl compound and one or more of said other vinyl compounds, said polycyclic aromatic vinyl compound being represented by the formula: ##STR17## and charging said electrophotographic plate positively.
Claim 21
Dependent Claim
188 words
In an electrophotographic method comprising a first step of charging an electrophotographic plate, a second step of exposing the electrophotographic plate to light and a third step of developing an electrostatic latent image formed on the electrophotographic plate directly or the electrostatic latent image transferred to a recording medium, the improvement which comprises using in the first step, as the electrophotographic plate, a complex type electrophotographic plate having a charge generating layer containing (c) a copper phthalocyanine and (d) at least one azo pigment selected from the group consisting of monoazo lake pigments and disazo pigments, and a charge transport layer containing (a) a nitrofluorenone and (b) at least one polycyclic aromatic vinyl polymer selected from the group consisting of a homopolymer of a polycyclic aromatic vinyl compound, a copolymer of said polycyclic aromatic vinyl compound and one or more other vinyl compounds, a brominated homopolymer of said polycyclic aromatic vinyl compound and a brominated copolymer of said polycyclic aromatic vinyl compound and one or more of said other vinyl compounds, said polycyclic aromatic vinyl compound being represented by the formula: ##STR18## and charging said electrophotographic plate positively.
Claim 22
Dependent Claim
188 words
In an electrophotographic method comprising a first step of charging an electrophotographic plate, a second step of exposing the electrophotographic plate to light and a third step of developing an electrostatic latent image formed on the electrophotographic plate directly or the electrostatic latent image transferred to a recording medium, the improvement which comprises using in the first step, as the electrophotographic plate, a complex type electrophotographic plate having a charge generating layer containing (c) a copper phthalocyanine and (d) at least one azo pigment selected from the group consisting of monoazo lake pigments and disazo pigments, and a charge transport layer containing (a) a nitrofluorenone and (b) at least one polycyclic aromatic vinyl polymer selected from the group consisting of a homopolymer of a polycyclic aromatic vinyl compound, a copolymer of said polycyclic aromatic vinyl compound and one or more other vinyl compounds, a brominated homopolymer of said polycyclic aromatic vinyl compound and a brominated copolymer of said polycyclic aromatic vinyl compound and one or more of said other vinyl compounds, said polycyclic aromatic vinyl compound being represented by the formula: ##STR18## and charging said electrophotographic plate positively.
Claim 23
Dependent Claim
50 words
A method according to claim 18, wherein the thickness of the charge generating layer is 0.1 to 5 μm and the thickness of the charge transport layer is 3 to 100 μm, and at least one of the charge generating layer and the charge transport layer contains a resin binder.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-10-04 | 1986-04-05 | 1986-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-04 | 1990-04-05 | 1990-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-04 | 1994-04-05 | 1994-10-05 | $7700.00 | Window Closed / Lapsed |