US4297425A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Imaging member
Assignee: Xerox Corp
•
Filing: 1980-06-26
•
Granted: 1981-10-27
•
Expires: 2000-06-26
Abstract
Abstract An imaging member comprising a hole generation layer and a contiguous hole transport layer, said hole transport layer comprising a transparent electrically inactive polycarbonate resinous material having a residual amount of a halogen containing organic solvent therein and dispersed therein from about 25 to about 75 percent by weight based on said transport layer composition of a diamine, said charge transport layer being substantially nonabsorbing in the spectral region at which the hole generation layer generates and injects photogenerated holes, but being capable of supporting the injection of photogenerated holes from said photoconductive material and transporting said hole through said charge transport layer, said charge transport layer also containing a stabilizing proportion of a di or triaryl methane compound of the general formula: ##STR1## wherein R 1 and R 2 are independently selected from the group consisting of a C 1 -C 8 alkyl, aryl, alkaryl and aralkyl, where said aryl is a phenyl group or a condensed ring group, where the alkyl group of said alkaryl and aralkyl is a C 1 -C 4 group, R 3 is independently selected from the group consisting of hydrogen and CH 3 ; and R 4 is the same as R 1 and R 2 or a disubstituted aminophenyl group wherein the substituents are independently selected from the group consisting of a C 1 -C 8 alkyl, aryl, alkaryl and aralkyl as defined supra.
Inventors
- 👤 Damodar M. Pai
- 👤 John M. Pochan
- 👤 Darlyn F. Pochan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:21
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/05; G03G5/06; G03G5/0601; G03G5/0612; G03G5/0614; G03G5/06142; G03G5/06144; G03G5/061443
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
339 words
In an imaging member comprising a hole generation layer and a contiguous hole transport layer, said generation layer comprising a photoconductive material exhibiting the capability of photogeneration of holes and injection of said holes, said hole transport layer comprising a transparent electrically inactive polycarbonate resinous material having a residual amount within the range of from about 0.01 to about 1.0 percent by weight of said transport layer in said layer of a halogen-containing organic solvent therein, and dispersed in said layer from about 25 to about 75 percent by weight based on said transport layer composition of a charge transport compound within the scope of the following structural formula: ##STR5## wherein R is ##STR6## and wherein X is independently selected from the group consisting of an alkyl group having from 1 to about 4 carbon atoms and chlorine in the ortho, meta or para position, said charge transport layer being substantially nonabsorbing in the spectral region at which the photoconductive material generates and injects photogenerated holes but being capable of supporting the injection of photogenerated holes from said photoconductive material and transporting said holes through said charge transport layer, the improvement consisting of the inclusion in said transport layer of a stabilizing compound within the scope of the following structural formula: ##STR7## wherein R 1 and R 2 are independently selected from the group consisting of a C 1 -C 8 alkyl, aryl, alkaryl and aralkyl, where said aryl is a phenyl group or a condensed ring group, where the alkyl group of said alkaryl and aralkyl is a C 1 -C 4 group, R 3 is independently selected from the group consisting of hydrogen and CH 3 ; and R 4 is the same as R 1 and R 2 or a disubstituted aminophenyl group wherein the substituents are independently selected from the group consisting of a C 1 -C 8 alkyl, aryl, alkaryl and aralkyl as defined supra, said stabilizing compound being present in an amount sufficient to at least minimize the deleterious effects of ultraviolet radiation.
Claim 2
Dependent Claim
339 words
In an imaging member comprising a hole generation layer and a contiguous hole transport layer, said generation layer comprising a photoconductive material exhibiting the capability of photogeneration of holes and injection of said holes, said hole transport layer comprising a transparent electrically inactive polycarbonate resinous material having a residual amount within the range of from about 0.01 to about 1.0 percent by weight of said transport layer in said layer of a halogen-containing organic solvent therein, and dispersed in said layer from about 25 to about 75 percent by weight based on said transport layer composition of a charge transport compound within the scope of the following structural formula: ##STR5## wherein R is ##STR6## and wherein X is independently selected from the group consisting of an alkyl group having from 1 to about 4 carbon atoms and chlorine in the ortho, meta or para position, said charge transport layer being substantially nonabsorbing in the spectral region at which the photoconductive material generates and injects photogenerated holes but being capable of supporting the injection of photogenerated holes from said photoconductive material and transporting said holes through said charge transport layer, the improvement consisting of the inclusion in said transport layer of a stabilizing compound within the scope of the following structural formula: ##STR7## wherein R 1 and R 2 are independently selected from the group consisting of a C 1 -C 8 alkyl, aryl, alkaryl and aralkyl, where said aryl is a phenyl group or a condensed ring group, where the alkyl group of said alkaryl and aralkyl is a C 1 -C 4 group, R 3 is independently selected from the group consisting of hydrogen and CH 3 ; and R 4 is the same as R 1 and R 2 or a disubstituted aminophenyl group wherein the substituents are independently selected from the group consisting of a C 1 -C 8 alkyl, aryl, alkaryl and aralkyl as defined supra, said stabilizing compound being present in an amount sufficient to at least minimize the deleterious effects of ultraviolet radiation.
Claim 3
Dependent Claim
23 words
The member of claim 1 wherein the weight ratio of said stabilizing compound to said charge transport compound is from 0.0005:1 to 0.1:1.
Claim 4
Dependent Claim
23 words
The member of claim 2 wherein said stabilizing compound is selected from the group consisting of bis(4'-N,N'-diethylamino-2-methylphenyl)phenyl methane; 1-bis-(4-dimethylaminophenyl)-1-phenyl ethane; and bis-[4-bis-(phenylmethyl)amino-2-chlorophenyl]phenyl methane.
Claim 5
Dependent Claim
21 words
The member of claim 3 wherein said polycarbonate is poly(4,4'-isopropylidene-diphenylene carbonate) having a molecular weight of from 20,000 to about 120,000.
Claim 6
Dependent Claim
12 words
The member of claim 4 wherein said charge transport compound is N,N'-diphenyl-N,N'-bis(3-methylphenyl)-[1,1'-biphenyl]-4,4'-diamine.
References Cited (Backward Citations)
US4078925A
Cited
US4081274A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-10-26 | 1985-04-27 | 1985-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-26 | 1989-04-27 | 1989-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-26 | 1993-04-27 | 1993-10-27 | $7700.00 | Window Closed / Lapsed |