US4734350A
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Positively charged developer compositions with modified charge enhancing additives containing amino alcohols
Assignee: Xerox Corp
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Filing: 1986-12-29
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Granted: 1988-03-29
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Expires: 2006-12-29
Abstract
Abstract An improved positively charged developer compositions comprised of toner compositions containing resin particles, pigment particles and modified charge enhancing additives comprised of flow aid compositions having chemically bonded thereto, or chemiadsorbed on the surface thereof amino alcohol derivatives comprising at least one hydroxyl group, and at least one amino substituent selected from the group consisting of primary amines, secondary amines, and tertiary amines; and carrier particles.
Inventors
- 👤 John W-P. Lin
- 👤 Paul C. Julien
- 👤 Lesley P. Dudek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:09
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/097; G03G9/09733; G03G9/09775; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
108 words
A positively charged developer composition comprising carrier particles and a toner composition containing resin particles, pigment particles, and modified charge enhancing additives comprising flow aid compositions having chemically bonded thereto, or chemiadsorbed onto the surface thereof, amino alcohol derivatives of the formula ##STR2## wherein R 1 , R 2 and R 3 are substituents independently selected from the group consisting of hydrogen, alkyl, substituted alkyl, phenyl, naphthyl, substituted phenyl, substituted naphthyl, amino, heterocyclic components containing nitrogen, oxygen, or sulfur; unsaturated substituents; and aliphatic cyclic substituents, subject to the provision that at least one of the R 1 , R 2 or R 3 substituents comprise a hydroxyl group.
Claim 2
Dependent Claim
108 words
A positively charged developer composition comprising carrier particles and a toner composition containing resin particles, pigment particles, and modified charge enhancing additives comprising flow aid compositions having chemically bonded thereto, or chemiadsorbed onto the surface thereof, amino alcohol derivatives of the formula ##STR2## wherein R 1 , R 2 and R 3 are substituents independently selected from the group consisting of hydrogen, alkyl, substituted alkyl, phenyl, naphthyl, substituted phenyl, substituted naphthyl, amino, heterocyclic components containing nitrogen, oxygen, or sulfur; unsaturated substituents; and aliphatic cyclic substituents, subject to the provision that at least one of the R 1 , R 2 or R 3 substituents comprise a hydroxyl group.
Claim 3
Dependent Claim
29 words
A developer composition in accordance with claim 1 wherein the amino alcohol is selected from the group consisting of 2-(N,N-dimethylamino)ethanol, 2-(N,N-diethylamino)ethanol, 4,4'-bis(dimethylamino)benzhydrol, 1-(4-methylpiperazino)propanol, 1,3-bis(dimethylamino)-2-propanol, and Malachite Green Carbinol base.
Claim 4
Dependent Claim
17 words
A developer composition in accordance with claim 1 wherein the flow aid compositions are hydrophobic or hydrophilic.
Claim 5
Dependent Claim
26 words
A developer composition in accordance with claim 1 wherein the flow aid compositions are selected from the group consisting of silicas, aluminum oxides, and titanium oxides.
Claim 6
Dependent Claim
27 words
A developer composition in accordance with claim 1 wherein the resin particles are selected from the group consisting of polyesters, styrene butadiene copolymers, or styrene methacrylate copolymers.
Claim 7
Dependent Claim
23 words
A developer composition in accordance with claim 1 wherein the pigment particles are selected from the group consisting of carbon black and magnetite.
Claim 8
Dependent Claim
25 words
A developer composition in accordance with claim 1 wherein the pigment particles are selected from the group consisting of magenta, cyan, yellow, and mixtures thereof.
Claim 9
Dependent Claim
56 words
A developer composition in accordance with claim 1 wherein the charge enhancing additive moiety which is chemically bonded to or chemiabsorbed onto the surface of the flow aid composition is prepared by treating the flow aid composition with an epoxide-containing silylating agent, and thereafter reacting the resulting composition with a primary amine, or a secondary amine.
Claim 10
Dependent Claim
17 words
A developer composition in accordance with claim 8 wherein the flow aid can be hydrophobic or hydrophilic.
Claim 11
Dependent Claim
23 words
A developer composition in accordance with claim 8 wherein the resin particles are selected from polyesters, styrene butadiene copolymers, or styrene methacrylate copolymers.
Claim 12
Dependent Claim
22 words
A developer composition in accordance with claim 8 wherein the pigment is selected from the group consisting of carbon black and magnetite.
Claim 13
Dependent Claim
18 words
A developer composition in accordance with claim 8 wherein the pigment is cyan, magnetite, yellow, or mixtures thereof.
Claim 14
Dependent Claim
19 words
A toner composition in accordance with claim 8 wherein the flow aid composition is an aluminum oxide or silica.
Claim 15
Dependent Claim
22 words
A developer composition in accordance with claim 1 wherein the carrier particles are comprised of a steel core or a ferrite core.
Claim 16
Dependent Claim
16 words
A developer composition in accordance with claim 1 wherein the carrier particles include a coating thereover.
Claim 17
Dependent Claim
30 words
A developer composition in accordance with claim 15 wherein the coating is a polychlorotrifluoroethylene-co-vinylchloride copolymer, a polyvinylidene fluoropolymer, a terpolymer of styrene, methacrylate, and vinyltriethoxysilane, fluorinated ethylene-propylene copolymers, or polytetrafluoroethylene.
Claim 18
Dependent Claim
22 words
A developer composition in accordance with claim 8 wherein the carrier particles are comprised of a steel core or a ferrite core.
Claim 19
Dependent Claim
16 words
A developer composition in accordance with claim 8 wherein the carrier particles include a coating thereover.
Claim 20
Dependent Claim
30 words
A developer composition in accordance with claim 18 wherein the coating is a polychlorotrifluoroethylene-co-vinylchloride copolymer, a polyvinylidene fluoropolymer, a terpolymer of styrene, methacrylate, and vinyltriethoxysilane, fluorinated ethylene-propylene copolymers, or polytetrafluoroethylene.
Claim 21
Dependent Claim
44 words
A method of imaging which comprises the generation of an electrostatic latent image on an imaging member; thereafter developing the aforementioned image with the developer composition of claim 1; subsequently transferring the image to a suitable substrate; and optionally permanently affixing the image thereto.
Claim 22
Dependent Claim
44 words
A method of imaging which comprises the generation of an electrostatic latent image on an imaging member; thereafter developing the aforementioned image with the developer composition of claim 8; subsequently transferring the image to a suitable substrate; and optionally permanently affixing the image thereto.
Claim 23
Dependent Claim
30 words
A method of imaging in accordance with claim 20 wherein the amino alcohol is selected from the group consisting of 2-(N,N-dimethylamino)ethanol, 2-(N,N-diethylamino)ethanol, 4,4'-bis(dimethylamino)benzhydrol, 1-(4-methylpiperazino)propanol, 1,3-bis(dimethylamino)-2-propanol, and Malachite Green Carbinol base.
Claim 24
Dependent Claim
20 words
A single component toner composition comprised of resin particles, pigment particles, and the modified charge enhancing additives of claim 1.
Claim 25
Dependent Claim
20 words
A single component toner composition comprised of resin particles, pigment particles, and the modified charge enhancing additives of claim 8.
Claim 26
Dependent Claim
16 words
A toner composition in accordance with claim 23 wherein the pigment particles are comprised of magnetites.
Claim 27
Dependent Claim
16 words
A toner composition in accordance with claim 24 wherein the pigment particles are comprised of magnetites.
Claim 28
Dependent Claim
32 words
A single component toner composition in accordance with claim 23 wherein the modified charge enhancing additives contain flow aid compositions selected from the group consisting of silicas, aluminum oxides, and titanium oxides.
References Cited (Backward Citations)
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JPS577951A
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JPS5778550A
Cited
JPS5779952A
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JPS57129446A
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US4618556A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-03-29 | 1991-09-28 | 1992-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-29 | 1995-09-28 | 1996-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-29 | 1999-09-28 | 2000-03-29 | $7700.00 | Window Closed / Lapsed |