US4397934A
Expired / Lapsed
US
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Developer compositions containing quaternized vinylpyridine polymers, and copolymers
Assignee: Xerox Corp
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Filing: 1981-12-31
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Granted: 1983-08-09
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Expires: 2001-12-31
Abstract
Abstract This invention relates to an electrostatic developer composition comprised of resin particles, pigment particles, carrier particles, and a charge enhancing component comprised of a partially quaternized vinylpyridinium polymer or copolymer selected from the group consisting of those materials of the following formula: ##STR1## wherein R is an alkyl radical, A is an anion, B is an alkyl group or hydrogen, S is an acrylate, phenyl, halogen or cyano radical, x, y, u, v, w represent weight fraction numbers, subject to the provision that the sum of x and y is equal to 1, and the sum of u, v, and w is equal to 1, which compositions are useful in causing the development of images in electrostatographic imaging systems.
Inventors
- 👤 Chin H. Lu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:32
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/10; G03G9/113; G03G9/1132; G03G9/1133; G03G9/1134
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
102 words
A positively charged dry developer composition comprised of resin particles, pigment particles, carrier particles, and a charge enhancing component comprised of partially quaternized vinylpyridinium polymer or copolymer selected from the group consisting of those materials of the following formula: ##STR6## wherein R is an alkyl radical, A is an anion, B is an alkyl radical or hydrogen, S is an acrylate, phenyl, halogen, or cyano radical, x, y, u, v, w represent weight fraction numbers, subject to the provision that the sum of x and y is equal to 1, and the sum of u, v, and w is equal to 1.
Claim 2
Dependent Claim
102 words
A positively charged dry developer composition comprised of resin particles, pigment particles, carrier particles, and a charge enhancing component comprised of partially quaternized vinylpyridinium polymer or copolymer selected from the group consisting of those materials of the following formula: ##STR6## wherein R is an alkyl radical, A is an anion, B is an alkyl radical or hydrogen, S is an acrylate, phenyl, halogen, or cyano radical, x, y, u, v, w represent weight fraction numbers, subject to the provision that the sum of x and y is equal to 1, and the sum of u, v, and w is equal to 1.
Claim 3
Dependent Claim
38 words
A developer composition in accordance with claim 1 wherein R is an alkyl radical containing from 1 carbon atom, to about 6 carbon atoms, and the anion A is selected from halides, sulfate, sulfonate, borate, nitrate, or phosphate.
Claim 4
Dependent Claim
34 words
A developer composition in accordance with claim 1 wherein the resin is a styrene/n-butyl methacrylate copolymer material, the pigment is carbon black, R is methyl, S is acrylate, and A is a halogen anion.
Claim 5
Dependent Claim
20 words
A developer composition in accordance with claim 1 wherein the charge enhancing component is poly(2-vinylpyridine) partially quaternized with isopropyl bromide.
Claim 6
Dependent Claim
20 words
A developer composition in accordance with claim 1 wherein the charge enhancing component is poly(4-vinylpyridine) partially quaternized with n-butyl bromide.
Claim 7
Dependent Claim
20 words
A developer composition in accordance with claim 1 wherein the charge enhancing component is poly(4-vinylpyridine/styrene) partially quaternized with n-butyl bromide.
Claim 8
Dependent Claim
48 words
A developer composition in accordance with claim 1 wherein the partially quaternized vinyl pyridinium polymer and copolymer are present in the range of from about 0.1 percent to about 98 percent, and the pigment is present in the range of from about 2 percent to about 20 percent.
Claim 9
Dependent Claim
29 words
A developer composition in accordance with claim 1 wherein the carrier particles are comprised of a steel core coated with a vinylidene fluoride polymer or a perfluoroalkoxy fluoro polymer.
Claim 10
Independent Claim
135 words
A method of imaging comprising forming a negative electrostatic latent image on an imaging member, contacting the image with a developer composition, comprised of resin particles, pigment particles, carrier particles, and a charge enhancing component comprised of a partially quaternized vinylpyridinium polymer or copolymer selected from the group consisting of those materials of the following formula: ##STR7## wherein R is an alkyl radical, A is an anion, B is an alkyl group or hydrogen, S is an acrylate, phenyl, halogen, or cyano radical, x, y, u, v, w represent weight fraction numbers, subject to the provision that the sum of x and y is equal to 1, and the sum of u, v, and w is equal to 1, followed by transferring the developed image to a suitable substrate, and permanently affixing said image thereto.
Claim 11
Independent Claim
135 words
A method of imaging comprising forming a negative electrostatic latent image on an imaging member, contacting the image with a developer composition, comprised of resin particles, pigment particles, carrier particles, and a charge enhancing component comprised of a partially quaternized vinylpyridinium polymer or copolymer selected from the group consisting of those materials of the following formula: ##STR7## wherein R is an alkyl radical, A is an anion, B is an alkyl group or hydrogen, S is an acrylate, phenyl, halogen, or cyano radical, x, y, u, v, w represent weight fraction numbers, subject to the provision that the sum of x and y is equal to 1, and the sum of u, v, and w is equal to 1, followed by transferring the developed image to a suitable substrate, and permanently affixing said image thereto.
Claim 12
Dependent Claim
39 words
A method of imaging in accordance with claim 9 wherein R is an alkyl radical containing from 1 carbon atom, to about 6 carbon atoms, and the anion A is selected from halides, sulfate, sulfonate, borate, nitrate or phosphate.
Claim 13
Dependent Claim
35 words
A method of imaging in accordance with claim 9 wherein the resin is a styrene/n-butyl methacrylate copolymer material, the pigment is carbon black, R is methyl, S is acrylate, and A is a halogen anion.
Claim 14
Dependent Claim
20 words
A method of imaging in accordance with claim 9 wherein the quaternized material is poly(2-vinylpyridine) partially quaternized with isopropyl bromide.
Claim 15
Dependent Claim
20 words
A method of imaging in accordance with claim 9 wherein the quaternized material is poly(4-vinylpyridine) partially quaternized with n-butyl bromide.
Claim 16
Dependent Claim
20 words
A method of imaging in accordance with claim 9 wherein the quaternized material is poly(4-vinylpyridine/styrene) partially quaternized with n-butyl bromide.
Claim 17
Dependent Claim
49 words
A method of imaging in accordance with claim 9 wherein the partially quaternized vinyl pyridinium polymer and copolymer are present in the range of from about 0.1 percent to about 98 percent, and the pigment is present in the range of from about 2 percent to about 20 percent.
Claim 18
Dependent Claim
30 words
A method of imaging in accordance with claim 9 wherein the carrier particles are comprised of a steel core coated with a vinylidene fluoride polymer, or a perfluoroalkoxy fluoro polymer.
Claim 19
Dependent Claim
51 words
A positively charged dry developer composition comprised of resin particles, pigment particles, carrier particles, and as a charge enhancing component a partially quaternized vinylpyridinium polymer or copolymer selected from the group consisting of a poly(2-vinylpyridine) partially quaternized with isopropobromide, poly(4-vinylpyridine) partially quaternized with n-butylbromide, or poly (4-vinylpyridine/styrene) partially quaternized with n-butylbromide.
Claim 20
Dependent Claim
51 words
A positively charged dry developer composition comprised of resin particles, pigment particles, carrier particles, and as a charge enhancing component a partially quaternized vinylpyridinium polymer or copolymer selected from the group consisting of a poly(2-vinylpyridine) partially quaternized with isopropobromide, poly(4-vinylpyridine) partially quaternized with n-butylbromide, or poly (4-vinylpyridine/styrene) partially quaternized with n-butylbromide.
Claim 21
Dependent Claim
46 words
A developer composition in accordance with claim 17 wherein the resin particles are comprised of a styrene butylmethacrylate copolymer, the pigment particles are comprised of carbon black, and the carrier particles consist of a steel core coated with a vinylidene fluoride polymer or perfluoroalkoxy fluoro polymer.
Claim 22
Dependent Claim
72 words
A developer composition in accordance with claim 17 wherein the resin particles are present in an amount of 92 percent by weight, and consist of a styrene n-butylmethacrylate copolymer, containing 65 percent by weight of styrene, and 35 percent by weight of n-butylmethacrylate, the pigment particles are present in an amount of 6 percent by weight, and the charge enhancing additive is present in an amount of about 2 percent by weight.
Claim 23
Dependent Claim
85 words
A method of imaging comprising forming a negative electrostatic latent image on an imaging member, contacting the image with the developer composition of claim 17, comprised of resin particles, pigment particles, carrier particles, and as a charge enhancing component a partially quaternized vinylpyridinium polymer or copolymer selected from the group consisting of a poly(2-vinylpyridine) partially quaternized with isopropobromide, poly(4-vinylpyridine) partially quaternized with n-butylbromide, or poly(4-vinylpyridine/styrene) partially quaternized with n-butylbromide, followed by transferring the developed image to a suitable substrate and permanently affixing the image thereto.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1986-08-08 | 1987-02-07 | 1987-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-08 | 1991-02-07 | 1991-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-08 | 1995-02-07 | 1995-08-09 | $7700.00 | Window Closed / Lapsed |