US4299897A Expired / Lapsed US ⏱️ 0.0 years remaining

Aromatic amino charge transport layer in electrophotography

Assignee: Xerox Corp

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Filing: 1980-02-15

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Granted: 1981-11-10

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Expires: 2000-02-15

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Abstract

Abstract A photosensitive member having at least two electrically operative layers is disclosed. The first layer comprises a photoconductive layer which is capable of photogenerating holes and injecting photogenerated holes into a contiguous charge transport layer. The charge transport layer comprises an electrically inactive organic resinous material containing from about 10 to about 75 percent by weight of: ##STR1## R 1 is selected from the group consisting of hydrogen (ortho) CH 3 , (meta) CH 3 , (para) CH 3 , and R 2 is selected from the group consisting of hydrogen, (ortho) CH 3 , (meta) CH 3 , and (para) CH 3 . The charge transport layer while substantially non-absorbing in the spectral region of intended use is "active" in that it allows injection of photogenerated holes from the photoconductive layer, and allows these holes to be transported through the charge transport layer. This structure may be imaged in the conventional xerographic mode which usually includes charging, exposure to light and development.

Inventors

👤 Milan Stolka
👤 John F. Yanus
👤 Damodar M. Pai
👤 Dale S. Renfer
👤 James M. Pearson

Bibliographic Details

Application Number —

Jurisdiction US

Data Source google_patents

Last Synchronized 2026-10-23 02:02

CPC Classifications

G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0601; G03G5/0612; G03G5/0614; G03G5/06142; G03G5/06144; G03G5/061443

Claims Analysis

Total Claims: 9

Claim 1

Independent Claim 166 words

An imaging member comprising a charge generation layer comprising a layer of photoconductive material and a contiguous charge transport layer of a polycarbonate resin having dispersed therein from about 10 to about 75 percent by weight of: ##STR28## wherein R 1 is selected from the group consisting of hydrogen, (ortho) CH 3 , (meta) CH 3 and (para) CH 3 , and R 2 is selected from the group consisting of hydrogen, (ortho) CH 3 , (meta) CH 3 and (para) CH 3 , said photoconductive layer exhibiting the capability of photogeneration of holes and injection of said holes and said charge transport layers being substantially non-absorbing in the spectral region at which time photoconductive layer generates and injects photogenerated holes but being capable of supporting the injection of photogenerated holes from said photoconductive layer and transporting said holes through said charge transport layer, said charge transport layer being substantially nonphotoconductive when exposed to light in the wavelength of from about 4,000 to about 8,000 Angstroms.

Claim 2

Dependent Claim 166 words

Claim 3

Dependent Claim 32 words

The member according to claim 1 wherein the material dispersed in the polycarbonate resin is selected from the group consisting of N,N,N',N'-tetraphenyl-[2,2'-dimethyl-1,1'-biphenyl]-4,4'-diamine; N,N'-diphenyl-N,N'-bis(2-methylphenyl)-[2,2'-dimethyl-1,1'-biphenyl]-4,4'-diamine; N,N'-diphenyl-N,N'-bis(3-methylphenyl)-[2,2'-dimethyl-1,1'-biphenyl]-4,4'-diamine; N,N'-diphenyl-N,N'-bis(4-methylphenyl)-[2,2'-dimethyl-1,1'-biphenyl]-4,4'-diamine; N,N,N',N'-tetra(2-methylphenyl)-[2,2'-dimethyl-1,1'-biphenyl]-4,4'-diamine; N,N'-bis(2-methylphenyl)-N,N'-bis(3-methylphenyl)-[2,2'-dimethyl-1,1'-biphenyl]-4,4'-diamine; N,N'-bis(2-methylphenyl)-N,N'-bis(4-methylphenyl)-[2,2'-dimethyl-1,1'-biphenyl]-4,4'-diamine; N,N,N',N'-tetra(3-methylphenyl)-[2,2'-dimethyl-1,1'-biphenyl]-4,4'-diamine; N,N'-bis(3-methylphenyl)-N,N'-bis(4-methylphenyl)-[2,2'-dimethyl-1,1'-biphenyl]-4,4'-diamine; and N,N,N',N'-tetra(4-methylphenyl)-[2,2'-dimethyl-1,1'-biphenyl]-4,4'-diamine.

Claim 4

Dependent Claim 28 words

The member according to claim 1 wherein the material dispersed in the polycarbonate resin is selected from the group consisting of: ##STR29## N,N,N',N'-Tetraphenyl-[2,2'-dimethyl-1,1'-biphenyl]-4,4'-diamine; ##STR30## N,N,N',N'-Tetra(4-methylphenyl)-[2,2'-dimethyl-1,1'-biphenyl]-4,4'-diamine; and ##STR31## N,N'-Diphenyl-N,N'-bis(4-methylphenyl)-[2,2'-dimethyl-1,1'-biphenyl]-4,4'-diamine.

Claim 5

Dependent Claim 20 words

The member according to claim 3 wherein the polycarbonate resin has a (Mw) of from about 20,000 to about 120,000.

Claim 6

Dependent Claim 19 words

The member according to claim 1 wherein the polycarbonate has a (Mw) of from about 20,000 to about 50,000.

Claim 7

Dependent Claim 20 words

The member according to claim 1 wherein the polycarbonate resin has a (Mw) of from about 50,000 to about 120,000.

Claim 8

Dependent Claim 23 words

The member according to claim 1 wherein the polycarbonate resin is poly(4,4'-iospropylidene-diphenylene carbonate) having a (Mw) of from about 25,000 to about 40,000.

Claim 9

Dependent Claim 22 words

The member according to claim 1 wherein the polycarbonate is poly(4,4'-isopropylidene-diphenylene carbonate) having a (Mw) of from about 40,000 to about 45,000.

References Cited (Backward Citations)

US3265496A Cited

US3387973A Cited

US3567450A Cited

US3589897A Cited

US3685990A Cited

US3992205A Cited

US3953207A Cited

US4115116A Cited

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USPTO Annuity & Maintenance Windows

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1984-11-09	1985-05-11	1985-11-10	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1988-11-09	1989-05-11	1989-11-10	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1992-11-09	1993-05-11	1993-11-10	$7700.00	Window Closed / Lapsed

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