Patent US4075012A successfully refreshed from Google Patents.
US4075012A
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Intrachain charge transfer complexes use in electrophotographic imaging
Assignee: Xerox Corp
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Filing: 1976-08-20
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Granted: 1978-02-21
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Expires: 1996-08-20
Abstract
Abstract Method for achieving free radical initiated copolymerization of an addition monomer having pendant therefrom a strong donor group with an addition monomer having pendant therefrom a strong acceptor group. Copolymers prepared according to this method can be represented by the following formula: ##STR1## WHEREIN R is hydrogen or methyl; R' is hydrogen or methyl; R" is hydrogen or methyl; R'" is alkyl of 1-10 carbon atoms; R' v is selected from the group consisting of --NO 2 , halogen, --CN and --CF 3 ; X and Y are independently selected from the group consisting of hydrogen, chlorine, bromine, alkyl of 1-4 carbon atoms and phenyl; Z is oxygen or dicyanomethylene; a and b can range from 0-4; and n and m can range from about 5 to about 95 percent. The polymeric compositions prepared according to this method are suitable for use in electrophotography either alone as the primary photoresponsive entity or in combination with other photoconductive materials.
Inventors
- 👤 Sam R. Turner
- 👤 Milan Stolka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:17
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/10; C08F20/26; C08F20/30; C08F220/00; C08F220/02; C08F220/10; C08F220/12; G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/07; G03G5/071; Y; Y10; Y10S; Y10S430/00; Y10S430/001; Y10S430/10
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
144 words
The electrophotographic imaging member comprising a photoconductive insulating layer containing a copolymer of the formula ##STR5## wherein R is hydrogen or alkyl of 1-6 carbon atoms; R' is hydrogen or methyl; R" is hydrogen or methyl; R'" is alkyl of 1-10 carbon atoms; R' v is selected from the group consisting of --NO 2 , halogen, --CN and --CF 3 ; X and Y are independently selected from the group consisting of hydrogen, chlorine, bromine, alkyl of 1-4 carbon atoms and phenyl; Z is oxygen or dicyanomethylene; a and b are in the range of from 0-4; n is in the range of from about 5 to about 95 percent of the total number of structural units of the copolymer; and m is in the range of from about 5 to about 95 percent of the total number of structural units of the copolymer.
Claim 2
Dependent Claim
144 words
The electrophotographic imaging member comprising a photoconductive insulating layer containing a copolymer of the formula ##STR5## wherein R is hydrogen or alkyl of 1-6 carbon atoms; R' is hydrogen or methyl; R" is hydrogen or methyl; R'" is alkyl of 1-10 carbon atoms; R' v is selected from the group consisting of --NO 2 , halogen, --CN and --CF 3 ; X and Y are independently selected from the group consisting of hydrogen, chlorine, bromine, alkyl of 1-4 carbon atoms and phenyl; Z is oxygen or dicyanomethylene; a and b are in the range of from 0-4; n is in the range of from about 5 to about 95 percent of the total number of structural units of the copolymer; and m is in the range of from about 5 to about 95 percent of the total number of structural units of the copolymer.
Claim 3
Dependent Claim
18 words
The imaging member of claim 1 wherein the copolymer comprises structural units from 1(2-anthryl) ethyl methacrylate and 2-ethylmethacryl-4,5,7-trinitro-9-fluorenone-2-carboxylate.
Claim 4
Dependent Claim
19 words
The imaging member of claim 1 wherein the copolymer comprises structural units from 1(2-anthryl) ethyl methacrylate and methyl methacrylate.
Claim 5
Dependent Claim
28 words
The imaging member of claim 1 wherein the photoconductive insulating layer comprises a layer of photoconductive materials and contiguous therewith a charge carrier transporting layer containing the copolymer.
Claim 6
Dependent Claim
15 words
The imaging member of claim 4 wherein the layer of photoconductive material comprises amorphous selenium.
Claim 7
Dependent Claim
15 words
The imaging member of claim 4 wherein the layer of photoconductive materials comprises trigonal selenium.
Claim 8
Dependent Claim
158 words
The imaging member of claim 4 wherein the charge carrier transporting layer comprises a polymer having structural units from at least three distinct monomers, said polymer comprising from about 5 to about 90 percent structural units from the monomer ##STR6## wherein R is hydrogen or alkyl of 1-6 carbon atoms; R' is hydrogen or methyl; X and Y are independently selected from the group consisting of hydrogen, chlorine, bromine, alkyl of 1-4 carbon atoms and phenyl; from about 5 to about 90 percent structural units from the monomer ##STR7## wherein R" is hydrogen or methyl; R'" is alkyl of 1-10 carbon atoms; R' v is selected from the group consisting of --NO 2 , halogen, --CN and --CF 3 ; Z is oxygen or dicyanomethylene; and from about 5 to about 30 structural units from a monomer which is devoid of pendant group capable of charge transfer interaction with the pendant groups of either of the above monomers.
Claim 9
Dependent Claim
175 words
In an electrophotographic imaging method which includes the steps of providing an electrophotographic imaging member, electrostatically charging said member and forming a latent image thereon, the improvement comprising: providing an electrophotographic member having a photoconductive insulating layer ##STR8## wherein R is hydrogen or alkyl of 1-6 carbon atoms; R' is hydrogen or methyl; R" is hydrogen or methyl; R'" is alkyl of 1-10 carbon atoms; R' v is selected from the group consisting of --NO 2 , halogen, --CN and --CF 3 ; X and Y are independently selected from the group consisting of hydrogen, chlorine, bromine, alkyl of 1-6 carbon atoms and phenyl; Z is oxygen or dicyanomethylene; a and b are in the range of from 0-4; n is in the range of from about 5 to about 95 percent of the total number of structural units of the copolymer; and m is in the range of from about 5 to about 95 percent of the total number of structural units of the copolymer; and forming an electrostatic latent image on said member.
Claim 10
Dependent Claim
175 words
In an electrophotographic imaging method which includes the steps of providing an electrophotographic imaging member, electrostatically charging said member and forming a latent image thereon, the improvement comprising: providing an electrophotographic member having a photoconductive insulating layer ##STR8## wherein R is hydrogen or alkyl of 1-6 carbon atoms; R' is hydrogen or methyl; R" is hydrogen or methyl; R'" is alkyl of 1-10 carbon atoms; R' v is selected from the group consisting of --NO 2 , halogen, --CN and --CF 3 ; X and Y are independently selected from the group consisting of hydrogen, chlorine, bromine, alkyl of 1-6 carbon atoms and phenyl; Z is oxygen or dicyanomethylene; a and b are in the range of from 0-4; n is in the range of from about 5 to about 95 percent of the total number of structural units of the copolymer; and m is in the range of from about 5 to about 95 percent of the total number of structural units of the copolymer; and forming an electrostatic latent image on said member.
Claim 11
Dependent Claim
28 words
The imaging method of claim 8 wherein the photoconductive insulating layer comprises a layer of photoconductive materials and contiguous therewith a charge carrier transporting layer containing the copolymer.
Claim 12
Dependent Claim
15 words
The imaging method of claim 9 wherein the layer of photoconductive materials comprises amorphous selenium.
Claim 13
Dependent Claim
15 words
The imaging method of claim 9 wherein the layer of photoconductive materials comprises trigonal selenium.
Claim 14
Dependent Claim
158 words
The imaging method of claim 9 wherein the charge carrier transporting layer comprises a polymer having structural units from at least three distinct monomers, said polymer comprising from about 5 to about 90 percent structural units from the monomer ##STR9## wherein R is hydrogen or alkyl of 1-6 carbon atoms; R' is hydrogen or methyl; X and Y are independently selected from the group consisting of hydrogen, chlorine, bromine, alkyl of 1-4 carbon atoms and phenyl; from about 5 to about 90 percent structural units from the monomer ##STR10## wherein R" is hydrogen or methyl; R'" is alkyl of 1-10 carbon atoms; R' v is selected from the group consisting of --NO 2 , halogen, --CN and --CF 3 ; Z is oxygen of dicyanomethylene; and from about 5 to about 30 structural units from a monomer which is devoid of pendant group capable of charge transfer interaction with the pendant groups of either of the above monomers.
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) | 1981-02-20 | 1981-08-22 | 1982-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-20 | 1985-08-22 | 1986-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-20 | 1989-08-22 | 1990-02-21 | $7700.00 | Window Closed / Lapsed |