US3935335A
Expired / Lapsed
US
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Method for producing support for electrophotographic material and electrostatic recording material
Assignee: Mitsubishi Paper Mills Ltd
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Filing: 1974-04-10
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Granted: 1976-01-27
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Expires: 1994-04-10
Abstract
Abstract A support for electrophotographic material and electrostatic recording material which is improved in solvent resistance and electroconductivity can be produced by firstly fixing an anionic sizing agent into an untreated paper and then fixing a cationic high polymer electroconducting agent into thus treated paper or coating the same thereon. Preferably, the first step is carried out by size pressing.
Inventors
- 👤 Isamu Maruyama
- 👤 Shigeyoshi Suzuki
- 👤 Yoshitake Yoshihiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:36
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/10; G03G5/105
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
100 words
In a method for producing a support for electrophotographic materials or electrostatic recording material which comprises applying an electroconducting agent to an untreated paper, the improvement comprising the first step of fixing an anionic sizing agent which is at least one member selected from the group consisting of a. sodium salts of maleic and derivative copolymers, b. ammonium salts of copolymers containing carboxyl groups, c. alkyd resin, d. petroleum resin, e. acrylic resin, and f. polyacrylamide resin into a layer of the untreated paper and the second step of coating an electroconductive quaternary ammonium polymer on the thus treated paper.
Claim 2
Dependent Claim
100 words
In a method for producing a support for electrophotographic materials or electrostatic recording material which comprises applying an electroconducting agent to an untreated paper, the improvement comprising the first step of fixing an anionic sizing agent which is at least one member selected from the group consisting of a. sodium salts of maleic and derivative copolymers, b. ammonium salts of copolymers containing carboxyl groups, c. alkyd resin, d. petroleum resin, e. acrylic resin, and f. polyacrylamide resin into a layer of the untreated paper and the second step of coating an electroconductive quaternary ammonium polymer on the thus treated paper.
Claim 3
Dependent Claim
14 words
A method according to claim 1, wherein the first step is accomplished by screening.
Claim 4
Dependent Claim
31 words
A method according to claim 1 wherein the total dried weight of the anionic sizing agent and the cationic high polymer electroconducting agent applied is 0.5 to 6.0 g/m 2 .
Claim 5
Dependent Claim
15 words
A method according to claim 1 wherein the first step is accomplished by size pressing.
Claim 6
Dependent Claim
15 words
A method according to claim 1 wherein the first step is accomplished by tub sizing.
Claim 7
Dependent Claim
14 words
A method according to claim 1 wherein the first step is accomplished by impregnation.
Claim 8
Dependent Claim
44 words
A method according to claim 1 wherein said anionic sizing agent is a sodium salt of a maleic acid derivative copolymer, said copolymer being selected from the group consisting of (a) styrene-maleic anhydride copolymer, (b) vinyl acetate-maleic anhydride copolymer and (c) isobutene-maleic anhydride copolymer.
Claim 9
Dependent Claim
100 words
In a method for producing a support for electrophotographic materials or electrostatic recording material which comprises applying an electroconducting agent to an untreated paper, the improvement comprising the first step of fixing an anionic sizing agent which is at least one member selected from the group consisting of a. sodium salts of maleic and derivative copolymers, b. ammonium salts of copolymers containing carboxyl groups, c. alkyd resin, d. petroleum resin, e. acrylic resin, and f. polyacrylamide resin into a layer of the untreated paper and the second step of fixing an electroconductive quaternary ammonium polymer into the thus treated paper.
Claim 10
Dependent Claim
100 words
In a method for producing a support for electrophotographic materials or electrostatic recording material which comprises applying an electroconducting agent to an untreated paper, the improvement comprising the first step of fixing an anionic sizing agent which is at least one member selected from the group consisting of a. sodium salts of maleic and derivative copolymers, b. ammonium salts of copolymers containing carboxyl groups, c. alkyd resin, d. petroleum resin, e. acrylic resin, and f. polyacrylamide resin into a layer of the untreated paper and the second step of fixing an electroconductive quaternary ammonium polymer into the thus treated paper.
Claim 11
Dependent Claim
44 words
A method according to claim 8 wherein said anionic sizing agent is a sodium salt of a maleic acid derivative copolymer, said copolymer being selected from the group consisting of (a) styrene-maleic anhydride copolymer, (b) vinyl acetate-maleic anhydride copolymer and (c) isobutene-maleic anhydride copolymer.
Claim 12
Dependent Claim
14 words
A method according to claim 8 wherein the first step is accomplished by screening.
Claim 13
Dependent Claim
15 words
A method according to claim 8 wherein the first step is accomplished by size pressing.
Claim 14
Dependent Claim
15 words
A method according to claim 8 wherein the first step is accomplished by tub sizing.
Claim 15
Dependent Claim
14 words
A method according to claim 8 wherein the first step is accomplished by impregnation.
Claim 16
Dependent Claim
31 words
A method according to claim 8 wherein the total dried weight of the anionic sizing agent and the cationic high polymer electroconducting agent applied is 0.5 to 6.0 g/m 2 .
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) | 1979-01-26 | 1979-07-28 | 1980-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-26 | 1983-07-28 | 1984-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-26 | 1987-07-28 | 1988-01-27 | $7700.00 | Window Closed / Lapsed |