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US5312706A
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Infra-red photoconductor based on octa-substituted phthalocyanines
Assignee: Xerox Corp
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Filing: 1992-05-29
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Granted: 1994-05-17
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Expires: 2012-05-29
Abstract
Abstract A photoconductor contains octa-substituted phthalocyanines in a charge generation layer. The photoconductor shows good sensitivity in the infra-red region of the electromagnetic spectrum from about 600 nm to about 900 nm.
Inventors
- 👤 Brian E. Springett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:06
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0664; G03G5/0696
Claims Analysis
Total Claims: 36
Claim 1
Independent Claim
39 words
A photoconductor comprising a charge generation layer, wherein the charge generation layer comprises a metal centered octa-substituted phthalocyanine, wherein substituents on exterior rings of the phthalocyanine comprise alkoxy groups and where said alkoxy groups are para to each other.
Claim 2
Dependent Claim
39 words
A photoconductor comprising a charge generation layer, wherein the charge generation layer comprises a metal centered octa-substituted phthalocyanine, wherein substituents on exterior rings of the phthalocyanine comprise alkoxy groups and where said alkoxy groups are para to each other.
Claim 3
Dependent Claim
89 words
A photoconductor of claim 1, wherein the octa-substituted phthalocyanine has the formula: ##STR2## wherein M is at least one member selected from the group consisting of zinc, copper, magnesium, iron, lead, manganese, chromium, nickel, cobalt, vanadium, zirconium, titanium, chloroindium, chlorogallium, bromoindium, and bromogallium; R is at least one member selected from the group consisting of a straight chain alkyl group having from 1 to 10 carbon atoms, a branched alkyl group having from 1 to 10 carbon atoms and a carboxyl group having from 2 to 10 carbon atoms.
Claim 4
Dependent Claim
14 words
The photoconductor of claim 1, wherein the charge generation layer further comprises a binder.
Claim 5
Dependent Claim
24 words
The photoconductor of claim 3, wherein a ratio of pigment:binder ranges from about 4:1 to about 1:100 by weight of the charge generation layer.
Claim 6
Dependent Claim
24 words
The photoconductor of claim 3, wherein the ratio of pigment:binder ranges from about 1:4 to about 2:1 by weight of the charge generation layer.
Claim 7
Dependent Claim
24 words
The photoconductor of claim 3, wherein the ratio of pigment:binder ranges from about 1:1 to about 2:3 by weight of the charge generation layer.
Claim 8
Dependent Claim
62 words
The photoconductor of claim 1, wherein the octa-substituted phthalocyanine is at least one member selected from the group consisting of 1, 4, 8, 11, 15, 18, 22, 25-octa-n-butoxyphthalocyanine; 1, 4, 8, 11, 15, 18, 22, 25-octa-n-methoxyphthalocyanine; 1, 4, 8, 11, 15, 18, 22, 25-octa-n-ethoxyphthalocyanine; 1, 4, 8, 11, 15, 18, 22, 25-octa-n-pentoxy phthalocyanine and 1, 4, 8, 11, 15, 18, 22, 25-octa-n-propoxyphthalocyanine.
Claim 9
Dependent Claim
21 words
The photoconductor of claim 2, wherein M is at least one member selected from the group consisting of zinc and copper.
Claim 10
Dependent Claim
9 words
The photoconductor of claim 1, further comprising a substrate.
Claim 11
Dependent Claim
25 words
The photoconductor of claim 9, further comprising a charge blocking layer and an adhesive layer between the charge blocking layer and the charge generation layer.
Claim 12
Dependent Claim
25 words
The photoconductor of claim 1, wherein the charge generation layer contains from about 20% by volume to about 90% by volume of the octa-substituted phthalocyanine.
Claim 13
Dependent Claim
25 words
The photoconductor of claim 1, wherein the charge generation layer contains from about 35% by volume to about 75% by volume of the octa-substituted phthalocyanine.
Claim 14
Dependent Claim
22 words
The photoconductor of claim 1, wherein the photoconductor is sensitive to light at wavelengths ranging from about 600 to about 900 nm.
Claim 15
Dependent Claim
50 words
A photoconductor comprising a substrate, a charge blocking layer, a charge generation layer and a charge transport layer, wherein the charge generation layer comprises a metal center octa-substituted phthalocyanine wherein substituents on exterior rings of the phthalocyanine comprise alkoxy groups and wherein said alkoxy groups are para to each other
Claim 16
Dependent Claim
50 words
A photoconductor comprising a substrate, a charge blocking layer, a charge generation layer and a charge transport layer, wherein the charge generation layer comprises a metal center octa-substituted phthalocyanine wherein substituents on exterior rings of the phthalocyanine comprise alkoxy groups and wherein said alkoxy groups are para to each other
Claim 17
Dependent Claim
50 words
The photoconductor of claim 1, further comprising at least one unsubstituted phthalocyanine selected from the group consisting of 2H(metal-free)-phthalocyanine, titanium oxy-phthalocyanine, vanadium oxy-phthalocyanine, aluminum phthalocyanine, aluminum polycholorphthalocyanine, barium phthalocyanine, beryllium phthalocyanine, cadmium phthalocyanine, calcium phthalocyanine, cerium phthalocyanine, chromium phthalocyanine, cobalt phthalocyanine, cobalt chlorophthalocyanine, copper bromophthalocyanine, copper 4-chlorophthalocyanine and copper phthalocyanine.
Claim 18
Dependent Claim
20 words
The photoconductor of claim 15, wherein the ratio of octa-substituted phthalocyanine: unsubstituted phthalocyanine ranges from about 1:10 to about 1:1.
Claim 19
Independent Claim
60 words
A method for preparing a photoconductor comprising: (a) applying a charge generation layer to a substrate; and (b) applying a charge transport layer to the charge generation layer; wherein the charge generation layer comprises a metal centered octa-substituted phthalocyanine, wherein substituents on exterior rings of the phthalocyanine comprise alkoxy groups and wherein said alkoxy groups are para to each other.
Claim 20
Independent Claim
60 words
A method for preparing a photoconductor comprising: (a) applying a charge generation layer to a substrate; and (b) applying a charge transport layer to the charge generation layer; wherein the charge generation layer comprises a metal centered octa-substituted phthalocyanine, wherein substituents on exterior rings of the phthalocyanine comprise alkoxy groups and wherein said alkoxy groups are para to each other.
Claim 21
Dependent Claim
66 words
The method of claim 17, wherein the octa-substituted phthalocyanine has the following formula: ##STR3## wherein M comprises a metal; and R is at least one member selected from the group consisting of a straight chain alkyl group having from 1 to 10 carbon atoms, a branched alkyl group having from 1 to 10 carbon atoms and a carboxyl group having from 2 to 10 carbon atoms.
Claim 22
Dependent Claim
26 words
The method of claim 17, wherein the charge generation layer is applied to the substrate by web-coating, spray coating, dip coating, vacuum deposition or spin coating.
Claim 23
Dependent Claim
13 words
The method of claim 17, wherein the charge generation layer comprises a binder.
Claim 24
Dependent Claim
16 words
The method of claim 20, wherein the ratio of pigment-binder is about 4:1 to about 1:100.
Claim 25
Dependent Claim
16 words
The method of claim 20, wherein the ratio of pigment-binder is about 1:4 to about 2:1.
Claim 26
Dependent Claim
16 words
The method of claim 20, wherein the ratio of pigment-binder is about 1:1 to about 2:3.
Claim 27
Dependent Claim
15 words
The method of claim 17, further comprising drying the charge generation layer on the substrate.
Claim 28
Dependent Claim
21 words
The method of claim 17, further comprising applying a charge blocking layer onto the substrate before applying the charge generation layer.
Claim 29
Dependent Claim
22 words
The method of claim 25, wherein an adhesive layer is applied onto the charge blocking layer before applying the charge generation layer.
Claim 30
Dependent Claim
44 words
The method of claim 17, wherein the octa-substituted phthalocyanine is 1, 4, 8, 11, 15, 18, 22, 25-octa-n-butoxy phthalocyanine, 1, 4, 8, 11, 15, 18, 22, 25-octa-n-methoxyphthalocyanine, 1, 4, 8, 11, 15, 18, 22, 25-octa-n-ethoxyphthalocyanine or 1, 4, 8, 11, 15, 18, 22, 25-octa-n-propoxyphthalocyanine.
Claim 31
Dependent Claim
11 words
The method of claim 18, wherein M comprises zinc or copper.
Claim 32
Dependent Claim
25 words
The method of claim 17, wherein the charge generation layer contains from about 20% by volume to about 90% by volume of the octa-substituted phthalocyanine.
Claim 33
Dependent Claim
25 words
The method of claim 29, wherein the charge generation layer contains from about 35% by volume to about 75% by volume of the octa-substituted phthalocyanine.
Claim 34
Dependent Claim
19 words
The method of claim 17, further comprising the step of adding an unsubstituted phthalocyanine to the charge generation layer.
Claim 35
Dependent Claim
52 words
The method of claim 31, wherein the unsubstituted phthalocyanine comprises at least one member selected from the group consisting of 2H(metal-free)-phthalocyanine, titanium oxy-phthalocyanine, vanadium oxy-phthalocyanine, aluminum phthalocyanine, aluminum polychlorophthalocyanine, barium phthalocyanine, beryllium phthalocyanine, cadmium phthalocyanine, calcium phthalocyanine, cerium phthalocyanine, chromium phthalocyanine, cobalt phthalocyanine, cobalt chlorophthalocyanine, copper bromophthalocyanine, copper 4-chlorophthalocyanine and copper phthalocyanine.
Claim 36
Dependent Claim
20 words
The method of claim 32, wherein the ratio of octa-substituted phthalocyanine: unsubstituted phthalocyanine ranges from about 1:10 to about 1:1.
References Cited (Backward Citations)
US3816118A
Cited
US3357989A
Cited
US4471039A
Cited
US4731312A
Cited
US4555463A
Cited
EP0180931A2
Cited
US4587189A
Cited
EP0262761A1
Cited
WO1988006175A1
Cited
US5032480A
Cited
US5039586A
Cited
EP0513370A1
Cited
EP0573201A1
Cited
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| 3.5 Years (Year 4) | 1997-05-16 | 1997-11-15 | 1998-05-17 | $2000.00 | Window Closed / Lapsed |
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