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US4302522A
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Method of making polymeric photoconductive material involves partial polymerization step
Assignee: Individual
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Filing: 1980-04-28
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Granted: 1981-11-24
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Expires: 2000-04-28
Abstract
Abstract A method of rendering a surface of substrate photoconduction comprising applying to the substrate a layer of N-vinyl carbazole and a prepolymer formed thereupon and completely polymerizing the monomer or prepolymer in situ on the substrate.
Inventors
- 👤 John L. Garnett
- 👤 John D. Rock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:07
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/07; G03G5/071; G03G5/072; G03G5/073; C; C08; C08F; C08F271/00; C08F271/02; C08F291/00; G03G5/05; G03G5/0525; Y; Y10; Y10S; Y10S430/00; Y10S430/136
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
180 words
A method of rendering a surface of a substrate photoconductive comprising the steps of: (a) partially, but incompletely, polymerizing, by means of ultraviolet or ionizing radiation, one or more monomers selected from the group having the formula ##STR4## wherein A is a vinyl group, a hydrogen atom or an alkyl group containing up to 7 carbon atoms and R1, R2, R3, R4, R5, R6, R7, and R8 are each selected from the group consisting of a hydrogen atom, a halogen atom and a vinyl group, with the proviso that when A is a hydrogen atom or a lower alkyl group containing up to 7 carbon atoms, at least one of R1, R2, R3, R4, R5, R6, R7, R8 is a vinyl group; (b) applying to the surface of a substrate selected from the group consisting of a metal, a plastic and a cellulosic material a single layer of the partially polymerized material formed in step (a); and (c) completing polymerization in situ, by means of ultraviolet or ionizing radiation, of the material which was only partially polymerized in step (a).
Claim 2
Independent Claim
180 words
A method of rendering a surface of a substrate photoconductive comprising the steps of: (a) partially, but incompletely, polymerizing, by means of ultraviolet or ionizing radiation, one or more monomers selected from the group having the formula ##STR4## wherein A is a vinyl group, a hydrogen atom or an alkyl group containing up to 7 carbon atoms and R1, R2, R3, R4, R5, R6, R7, and R8 are each selected from the group consisting of a hydrogen atom, a halogen atom and a vinyl group, with the proviso that when A is a hydrogen atom or a lower alkyl group containing up to 7 carbon atoms, at least one of R1, R2, R3, R4, R5, R6, R7, R8 is a vinyl group; (b) applying to the surface of a substrate selected from the group consisting of a metal, a plastic and a cellulosic material a single layer of the partially polymerized material formed in step (a); and (c) completing polymerization in situ, by means of ultraviolet or ionizing radiation, of the material which was only partially polymerized in step (a).
Claim 3
Dependent Claim
16 words
A method as claimed in claim 1 in which the monomer of step (a) is N-vinylcarbazole.
Claim 4
Dependent Claim
42 words
A method as claimed in claim 1 in which the monomer or partially polymerized material of step (a) is mixed with another monomeric or polymeric material prior to being partially polymerised or applied to the surface of a substrate in step (b).
Claim 5
Dependent Claim
69 words
A method as claimed in claim 3 in which the other monomeric material is selected from the group consisting of an acrylate, a substituted acrylate, a methacrylate, a substituted methacrylate, a vinyl halide, a vinylidene halide, acrylonitrile, acrylic acid, an olefin acetate, vinylpyridine, styrene, a substituted styrene, isoprene, an olefine, a vinyl ether, a vinyl naphthalene, acrolein, an alkyl isothiocyanate, a vinyl silane, acrylamide, dimethacrylamide, divinyl benzene and allylamine.
Claim 6
Dependent Claim
44 words
A method as claimed in claim 1 in which the monomer or partially polymerized material of step (a) is mixed with a material selected from the group consisting of polycyclic aromatic hydrocarbons, 2,4, 7-trinitro-9-flurenone, mineral acids and soluble salts of cadmium, mercury and zinc.
Claim 7
Dependent Claim
36 words
A method as claimed in claim 1 which the monomer or partially polymerized material layer is of such a thickness that the polymerised layer has a thickness of from 0.02 to 0.5 thousandths of an inch.
Claim 8
Dependent Claim
46 words
A method as claimed in claim 1 in which the substrate is paper and in which the monomer or partially polymerized material layer is such that an amount of polymer of from 2 to 25% of the weight of the paper is adhered to the paper.
References Cited (Backward Citations)
US3155503A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-11-23 | 1985-05-25 | 1985-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-23 | 1989-05-25 | 1989-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-23 | 1993-05-25 | 1993-11-24 | $7700.00 | Window Closed / Lapsed |