US4921769A
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US
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Photoresponsive imaging members with polyurethane blocking layers
Assignee: Xerox Corp
•
Filing: 1988-10-03
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Granted: 1990-05-01
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Expires: 2008-10-03
Abstract
Abstract An imaging member comprised of an optional supporting substrate; a ground plane layer; a blocking layer; an optional adhesive layer; a photogenerator layer; and a charge transport layer, wherein the blocking layer is comprised of a polyurethane of the formula: ##STR1## wherein A is a trivalent group; A' is a bivalent group; R is selected from the group consisting of alkylene, substituted alkylene, arylene, and substituted arylene; x and y are number mole fractions the sum of which is equal to 1.0.
Inventors
- 👤 Huoy-Jen Yuh
- 👤 Beng S. Ong
- 👤 John W. Spiewak
- 👤 Constance J. Thornton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:40
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/14; G03G5/142
Claims Analysis
Total Claims: 41
Claim 1
Independent Claim
82 words
An imaging member comprised of an optional supporting substrate; a ground plane layer; a blocking layer; an optional adhesive layer; a photogenerator layer; and a charge transport layer, wherein the blocking layer is comprised of a polyurethane of the formula: ##STR15## wherein A is a trivalent group; A' is a bivalent group; R is selected from the group consisting of alkylene, substituted alkylene, arylene, and substituted arylene; x and y are number mole fractions the sum of which is equal to 1.0.
Claim 2
Dependent Claim
82 words
An imaging member comprised of an optional supporting substrate; a ground plane layer; a blocking layer; an optional adhesive layer; a photogenerator layer; and a charge transport layer, wherein the blocking layer is comprised of a polyurethane of the formula: ##STR15## wherein A is a trivalent group; A' is a bivalent group; R is selected from the group consisting of alkylene, substituted alkylene, arylene, and substituted arylene; x and y are number mole fractions the sum of which is equal to 1.0.
Claim 3
Dependent Claim
16 words
An imaging member in accordance with claim 1 wherein the photogenerator layer is comprised of selenium.
Claim 4
Dependent Claim
18 words
An imaging member in accordance with claim 1 wherein the photogenerator layer is comprised of a selenium alloy.
Claim 5
Dependent Claim
17 words
An imaging member in accordance with claim 3 wherein the alloy is selenium arsenic, or selenium tellurium.
Claim 6
Dependent Claim
21 words
An imaging member in accordance with claim 1 wherein the trivalent group A contains from 4 to about 20 carbon atoms.
Claim 7
Dependent Claim
20 words
An imaging member in accordance with claim 1 wherein A is 2,2-dimethylene butyl, 2,2-dimethylene propyl, 2,2-dimethylene ethyl, or triethylene amine.
Claim 8
Dependent Claim
24 words
An imaging member in accordance with claim 1 wherein the blocking layer is of a thickness of from about 0.01 to about 2 microns.
Claim 9
Dependent Claim
24 words
An imaging member in accordance with claim 1 wherein the blocking layer is of a thickness of from about 0.1 to about 5 microns.
Claim 10
Dependent Claim
22 words
An imaging member in accordance with claim 1 wherein R is an arylene group of from 6 to about 24 carbon atoms.
Claim 11
Dependent Claim
22 words
An imaging member in accordance with claim 1 wherein R is a alkylene group of from 1 to about 20 carbon atoms.
Claim 12
Dependent Claim
15 words
An imaging member in accordance with claim 1 wherein R is hexamethylene, phenylene, or tolylene.
Claim 13
Dependent Claim
25 words
An imaging member in accordance with claim 1 wherein the bivalent group A' contains heteroatoms selected from the group consisting of nitrogen, oxygen, and sulfur.
Claim 14
Dependent Claim
56 words
An imaging member in accordance with claim 1 wherein A' is --CH 2 CH 2 OCH 2 CH 2 --; --CH 2 CH 2 OCH 2 CH 2 OCH 2 CH 2 --; --CH 2 CH 2 N(t-C 4 H 9 )CH 2 CH 2 --; or --CH 2 CH 2 SCH 2 CH 2 --.
Claim 15
Dependent Claim
25 words
An imaging member in accordance with claim 1 wherein A' is --(CH 2 )n--wherein n is a number of from about 2 to about 20.
Claim 16
Dependent Claim
52 words
An imaging member in accordance with claim 1 wherein the polyurethane is selected from the group consisting of those represented by the formulas of FIGS. 1, 2, 3, 4, 5, 6, 7, 8, 9, and 10, wherein x and y are number mole fractions the sum of which is equal to 1.0.
Claim 17
Dependent Claim
15 words
An imaging member in accordance with claim 1 containing a conductive or polymeric supporting substrate.
Claim 18
Dependent Claim
42 words
An imaging member in accordance with claim 1 wherein the photogenerating layer is comprised of a photogenerating pigment optionally dispersed in a resinous binder, and the transport layer is comprised of an aryl amine hole transport material dispersed in a resinous binder.
Claim 19
Dependent Claim
29 words
An imaging member in accordance with claim 17 wherein the photogenerating pigment is selected from the group consisting of metal phthalocyanines; metal free phthalocyanines; vanadyl phthalocyanine; and trigonal selenium.
Claim 20
Dependent Claim
28 words
An imaging member in accordance with claim 1 wherein the charge transport layer contains molecules of the formula ##STR16## wherein X is an alkyl group, or halogen atom.
Claim 21
Dependent Claim
47 words
An imaging member in accordance with claim 19 wherein the polyurethane blocking layer is represented by the formulas of FIGS. 1, 2, 3, 4, 5, 6, 7, 8, 9, and 10, wherein x and y are number mole fractions the sum of which is equal to 1.0.
Claim 22
Dependent Claim
12 words
An imaging layer in accordance with claim 1 containing an adhesive layer.
Claim 23
Dependent Claim
27 words
An imaging layer in accordance with claim 21 wherein the adhesive layer is selected from the group consisting of polyesters, phenoxy resins, vinyl polymers, and silicon polymers.
Claim 24
Dependent Claim
13 words
An imaging layer in accordance with claim 17 containing a polymeric adhesive layer.
Claim 25
Dependent Claim
27 words
An imaging layer in accordance with claim 23 wherein the adhesive layer is selected from the group consisting of polyesters, phenoxy resins, vinyl polymers, and silicon polymers.
Claim 26
Dependent Claim
74 words
An imaging member comprised of a ground plane layer; a blocking layer; a photogenerator layer; and a charge transport layer, wherein the blocking layer is comprised of a polyurethane of the formula: ##STR17## wherein A is a trivalent group; A' is a bivalent group; R is selected from the group consisting of alkylene, substituted alkylene, arylene, and substituted arylene; x and y are number mole fractions the sum of which is equal to 1.0.
Claim 27
Dependent Claim
74 words
An imaging member comprised of a ground plane layer; a blocking layer; a photogenerator layer; and a charge transport layer, wherein the blocking layer is comprised of a polyurethane of the formula: ##STR17## wherein A is a trivalent group; A' is a bivalent group; R is selected from the group consisting of alkylene, substituted alkylene, arylene, and substituted arylene; x and y are number mole fractions the sum of which is equal to 1.0.
Claim 28
Dependent Claim
31 words
An imaging layer in accordance with claim 25 wherein the polyurethane blocking layer is represented by the formulas of FIGS. 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10.
Claim 29
Dependent Claim
23 words
An imaging layer in accordance with claim 1 wherein x and y are mole fraction numbers of from about 0.05 to about 0.95.
Claim 30
Dependent Claim
23 words
An imaging layer in accordance with claim 25 wherein x and y are mole fraction numbers of from about 0.05 to about 0.95.
Claim 31
Dependent Claim
25 words
An imaging layer in accordance with claim 1 wherein the adhesive layer is of a thickness of from about 0.05 micron to about 5 microns.
Claim 32
Dependent Claim
12 words
An imaging layer in accordance with claim 25 containing a supporting substrate.
Claim 33
Dependent Claim
102 words
An imaging member comprised of a ground plane layer; a blocking layer; a photogenerator layer; and a charge transport layer, wherein the blocking layer is comprised of a polyurethane of the formula of claim 1; wherein A is a trivalent group selected from the group consisting of dialkylene alkyl and trialkylene amine; A' is a bivalent group selected from the group consisting of alkylene, arylene, polyether segments, and the derivatives thereof; R is selected from the group consisting of alkylene, substituted alkylene, arylene, and substituted arylene; and x and y are number mole fractions the sum of which is equal to 1.0.
Claim 34
Dependent Claim
12 words
An imaging member in accordance with claim 31 containing a supporting substrate.
Claim 35
Dependent Claim
12 words
An imaging member in accordance with claim 31 containing an adhesive layer.
Claim 36
Dependent Claim
22 words
An imaging member in accordance with claim 33 wherein the adhesive layer is situated between the photogenerating layer and the blocking layer.
Claim 37
Dependent Claim
53 words
An imaging member in accordance with claim 31 wherein the polyurethane is selected from the group consisting of those compounds represented by the formulas of FIGS. 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10, wherein x and y are number mole fractions the sum of which is equal to 1.0.
Claim 38
Dependent Claim
23 words
An imaging member in accordance with claim 31 wherein x and y are mole fraction numbers of from about 0.05 to about 0.95.
Claim 39
Dependent Claim
23 words
An imaging member in accordance with claim 31 wherein the photogenerating layer is situated between the blocking layer and the charge transport layer.
Claim 40
Dependent Claim
22 words
An imaging member in accordance with claim 1 wherein the blocking layer is situated between the ground plane and the adhesive layer.
Claim 41
Dependent Claim
35 words
An imaging member in accordance with claim 25 wherein the blocking layer is in contact with the photogenerating layer and wherein the photogenerating layer is situated between the blocking layer and the charge transport layer.
References Cited (Backward Citations)
US2901348A
Cited
US4106935A
Cited
US3713821A
Cited
US3879199A
Cited
US3888665A
Cited
US3907650A
Cited
US3972717A
Cited
US3891435A
Cited
US4010031A
Cited
US3975635A
Cited
US4075012A
Cited
US4013623A
Cited
US4050934A
Cited
US4063947A
Cited
US4264695A
Cited
US4082551A
Cited
US4673628A
Cited
US4465751A
Cited
US4391888A
Cited
US4415639A
Cited
US4474865A
Cited
US4582773A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-04-30 | 1993-10-30 | 1994-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-30 | 1997-10-30 | 1998-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-30 | 2001-10-30 | 2002-05-01 | $7700.00 | Window Closed / Lapsed |