US5030535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid developer compositions containing polyolefin resins
Assignee: Xerox Corp
•
Filing: 1989-01-23
•
Granted: 1991-07-09
•
Expires: 2009-01-23
Abstract
Abstract Disclosed is a liquid developer composition comprising a liquid vehicle, a charge control additive, and toner particles containing pigment particles and a resin selected from the group consisting of polyolefins, halogenated polyolefins, and mixtures thereof. Preferred resins include poly-α-olefins and chlorinated polypropylenes. The resin is soluble in the liquid vehicle at elevated temperatures and insoluble in the liquid vehicle at ambient temperatures. Also disclosed is a liquid developer composition comprising a liquid vehicle, pigment particles, a charge control additive, and a resin selected from the group consisting of polyolefins, halogenated polyolefins, and mixtures thereof, wherein the resin is soluble in the liquid vehicle at elevated temperatures and insoluble in the liquid vehicle at ambient temperatures, and wherein the liquid developer is prepared by dissolving the resin in the liquid vehicle at temperatures of from about 80° C. to about 120° C., subsequently adding the pigment particles to the resulting solution, attriting the resulting mixture for from about 20 minutes to about 75 minutes, cooling the mixture to ambient temperature over a period of from about 1 hour to about 3 hours with continuous mixing, and subsequently adding to the mixture the charge control additive.
Inventors
- 👤 Stephan Drappel
- 👤 Timothy J. Fuller
- 👤 Melvin D. Croucher
- 👤 James D. Mayo
- 👤 Raymond W. Wong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:10
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/12; G03G9/13; G03G9/131
Claims Analysis
Total Claims: 48
Claim 1
Independent Claim
55 words
A liquid developer composition consisting essentially of a liquid vehicle, a charge control additive, and toner particles containing pigment particles and a resin selected from the group consisting of polyolefins, halogenated polyolefins, and mixtures thereof, said resin being soluble in said liquid vehicle at elevated temperatures and insoluble in said liquid vehicle at ambient temperatures.
Claim 2
Dependent Claim
55 words
A liquid developer composition consisting essentially of a liquid vehicle, a charge control additive, and toner particles containing pigment particles and a resin selected from the group consisting of polyolefins, halogenated polyolefins, and mixtures thereof, said resin being soluble in said liquid vehicle at elevated temperatures and insoluble in said liquid vehicle at ambient temperatures.
Claim 3
Dependent Claim
45 words
A liquid developer composition according to claim 1 wherein the resin is soluble in the liquid vehicle at temperatures of from about 75° C. to about 125° C. and insoluble in said liquid vehicle at temperatures of from about 10° C. to about 65° C.
Claim 4
Dependent Claim
24 words
A liquid developer composition according to claim 1 wherein the resin is selected from the group consisting of poly-α-olefins, chlorinated polypropylenes, and mixtures thereof.
Claim 5
Dependent Claim
96 words
A liquid developer composition according to claim 1 wherein the liquid vehicle is present in an amount of from about 85 to about 99.5 percent by weight of the developer, the charge control additive is present in an amount of from about 0.01 to about 2.0 percent by weight of the developer, the pigment particles are present in an amount of from about 10 to about 50 percent by weight of the toner particles, and the resin is present in an amount of from about 50 to about 90 percent by weight of the toner particles.
Claim 6
Dependent Claim
31 words
A liquid developer composition according to claim 1 wherein the toner particles are present in the liquid developer in an amount of from about 0.5 to about 10 percent by weight.
Claim 7
Dependent Claim
38 words
A liquid developer composition according to claim 1 wherein the toner particles comprise from about 10 to about 50 percent by weight of the pigment and from about 50 to about 90 percent by weight of the resin.
Claim 8
Dependent Claim
16 words
A liquid developer composition according to claim 1 wherein the liquid vehicle is an isoparaffinic hydrocarbon.
Claim 9
Dependent Claim
15 words
A liquid developer composition according to claim 1 wherein the pigment particles are carbon black.
Claim 10
Dependent Claim
30 words
A liquid developer composition according to claim 1 wherein the charge control additive is selected from the group consisting of iron naphthenate, zirconium octoate, basic barium petronate, and polyisobutylene succinimide.
Claim 11
Dependent Claim
25 words
A liquid developer composition according to claim 1 wherein the resin is selected from the group consisting of chlorinated polypropylene, polyhexadecene, polyoctadecene, and mixtures thereof.
Claim 12
Dependent Claim
14 words
A liquid developer composition according to claim 1 wherein the resin is chlorinated polypropylene.
Claim 13
Dependent Claim
13 words
A liquid developer composition according to claim 1 wherein the resin is polyhexadecene.
Claim 14
Dependent Claim
13 words
A liquid developer composition according to claim 1 wherein the resin is polyoctadecene.
Claim 15
Dependent Claim
24 words
A liquid developer composition according to claim 1 wherein the developer exhibits a transfer efficiency of from about 95 percent to about 99.9 percent.
Claim 16
Dependent Claim
33 words
A liquid developer composition according to claim 1 wherein images developed with the developer and transferred to a substrate may be fused at temperatures of from about 70° C. to about 100° C.
Claim 17
Dependent Claim
131 words
A liquid developer composition consisting essentially of a liquid vehicle, pigment particles, a charge control additive, and a resin selected from the group consisting of polyolefins, halogenated polyolefins, and mixtures thereof, said resin being soluble in said liquid vehicle at elevated temperatures and insoluble in said liquid vehicle at ambient temperatures, wherein said liquid developer is prepared by dissolving the resin in the liquid vehicle at temperatures of from about 80° C. to about 120° C., subsequently adding the pigment particles to the resulting solution, attriting the resulting mixture for from about 20 to about 75 minutes, cooling the mixture to ambient temperature with continuous mixing, and subsequently adding to the solution the charge control additive to form a developer containing toner particles consisting of the resin and the pigment particles.
Claim 18
Dependent Claim
131 words
A liquid developer composition consisting essentially of a liquid vehicle, pigment particles, a charge control additive, and a resin selected from the group consisting of polyolefins, halogenated polyolefins, and mixtures thereof, said resin being soluble in said liquid vehicle at elevated temperatures and insoluble in said liquid vehicle at ambient temperatures, wherein said liquid developer is prepared by dissolving the resin in the liquid vehicle at temperatures of from about 80° C. to about 120° C., subsequently adding the pigment particles to the resulting solution, attriting the resulting mixture for from about 20 to about 75 minutes, cooling the mixture to ambient temperature with continuous mixing, and subsequently adding to the solution the charge control additive to form a developer containing toner particles consisting of the resin and the pigment particles.
Claim 19
Dependent Claim
26 words
A liquid developer according to claim 16 wherein the mixture is cooled to ambient temperature over a period of from about 1 to about 3 hours.
Claim 20
Dependent Claim
24 words
A liquid developer composition according to claim 16 wherein the resin is selected from the group consisting of poly-α-olefins, chlorinated polypropylenes, and mixtures thereof.
Claim 21
Dependent Claim
96 words
A liquid developer composition according to claim 16 wherein the liquid vehicle is present in an amount of from about 90 to about 99.4 percent by weight of the developer, the charge control additive is present in an amount of from about 0.01 to about 2.0 percent by weight of the developer, the pigment particles are present in an amount of from about 10 to about 50 percent by weight of the toner particles, and the resin is present in an amount of from about 50 to about 90 percent by weight of the toner particles.
Claim 22
Dependent Claim
34 words
A liquid developer composition according to claim 16 wherein the toner particles are present in the liquid developer in an amount of from about 0.5 to about 10 percent by weight of the developer.
Claim 23
Dependent Claim
38 words
A liquid developer composition according to claim 16 wherein the toner particles comprise from about 10 to about 50 percent by weight of the pigment and from about 50 to about 90 percent by weight of the resin.
Claim 24
Dependent Claim
16 words
A liquid developer composition according to claim 16 wherein the liquid vehicle is an isoparaffinic hydrocarbon.
Claim 25
Dependent Claim
15 words
A liquid developer composition according to claim 16 wherein the pigment particles are carbon black.
Claim 26
Dependent Claim
30 words
A liquid developer composition according to claim 16 wherein the charge control additive is selected from the group consisting of iron naphthenate, zirconium octoate, basic barium petronate, and polyisobutylene succinimide.
Claim 27
Dependent Claim
25 words
A liquid developer composition according to claim 16 wherein the resin is selected from the group consisting of chlorinated polypropylene, polyhexadecene, polyoctadecene, and mixtures thereof.
Claim 28
Dependent Claim
14 words
A liquid developer composition according to claim 16 wherein the resin is chlorinated polypropylene.
Claim 29
Dependent Claim
13 words
A liquid developer composition according to claim 16 wherein the resin is polyhexadecene.
Claim 30
Dependent Claim
13 words
A liquid developer composition according to claim 16 wherein the resin is polyoctadecene.
Claim 31
Dependent Claim
24 words
A liquid developer composition according to claim 16 wherein the developer exhibits a transfer efficiency of from about 95 percent to about 99.9 percent.
Claim 32
Dependent Claim
35 words
A liquid developer composition according to claim 16 wherein images developed with the developer and transferred to a substrate are capable of being fused at temperatures of from about 70° C. to about 100° C.
Claim 33
Dependent Claim
45 words
A method of imaging which comprises forming an electrostatic latent image on an imaging member, developing the latent image by contacting it with the developer composition of claim 1, transferring the developed image to a substrate, and permanently affixing the developed image to the substrate.
Claim 34
Dependent Claim
27 words
A method according to claim 31 wherein the developed image is permanently affixed to the substrate at temperatures of from about 70° C. to about 100° C.
Claim 35
Dependent Claim
45 words
A method of imaging which comprises forming an electrostatic latent image on an imaging member, developing the latent image by contacting it with the developer composition of claim 16, transferring the developed image to a substrate, and permanently affixing the developed image to the substrate.
Claim 36
Dependent Claim
27 words
A method according to claim 33 wherein the developed image is permanently affixed to the substrate at temperatures of from about 70° C. to about 100° C.
Claim 37
Dependent Claim
54 words
A liquid developer composition which comprises a liquid vehicle, a charge control additive, and toner particles containing pigment particles and a resin selected from the group consisting of polyolefins, halogenated polyolefins, and mixtures thereof, said resin being soluble in said liquid vehicle at elevated temperatures and insoluble in said liquid vehicle at ambient temperatures.
Claim 38
Dependent Claim
54 words
A liquid developer composition which comprises a liquid vehicle, a charge control additive, and toner particles containing pigment particles and a resin selected from the group consisting of polyolefins, halogenated polyolefins, and mixtures thereof, said resin being soluble in said liquid vehicle at elevated temperatures and insoluble in said liquid vehicle at ambient temperatures.
Claim 39
Dependent Claim
24 words
A liquid developer composition according to claim 35 wherein the resin is selected from the group consisting of poly-α-olefins, chlorinated polypropylenes, and mixtures thereof.
Claim 40
Dependent Claim
129 words
A liquid developer composition comprising a liquid vehicle, pigment particles, a charge control additive, and a resin selected from the group consisting of polyolefins, halogenated polyolefins, and mixtures thereof, said resin being soluble in said liquid vehicle at elevated temperatures and insoluble in said liquid vehicle at ambient temperatures, wherein said liquid developer is prepared by dissolving the resin in the liquid vehicle at temperatures of from about 80° C. to about 120° C., subsequently adding the pigment particles to the resulting solution, attriting the resulting mixture for from about 20 to about 75 minutes, cooling the mixture to ambient temperature with continuous mixing, and subsequently adding to the solution the charge control additive to form a developer containing toner particles consisting of the resin and the pigment particles.
Claim 41
Dependent Claim
129 words
A liquid developer composition comprising a liquid vehicle, pigment particles, a charge control additive, and a resin selected from the group consisting of polyolefins, halogenated polyolefins, and mixtures thereof, said resin being soluble in said liquid vehicle at elevated temperatures and insoluble in said liquid vehicle at ambient temperatures, wherein said liquid developer is prepared by dissolving the resin in the liquid vehicle at temperatures of from about 80° C. to about 120° C., subsequently adding the pigment particles to the resulting solution, attriting the resulting mixture for from about 20 to about 75 minutes, cooling the mixture to ambient temperature with continuous mixing, and subsequently adding to the solution the charge control additive to form a developer containing toner particles consisting of the resin and the pigment particles.
Claim 42
Dependent Claim
24 words
A liquid developer composition according to claim 37 wherein the resin is selected from the group consisting of poly-α-olefins, chlorinated polypropylenes, and mixtures thereof.
Claim 43
Dependent Claim
99 words
A process for preparing a liquid developer composition which comprises dissolving in a liquid vehicle at temperatures of from about 80° C. to about 120° C. a resin selected from the group consisting of polyolefins, halogenated polyolefins, and mixtures thereof, said resin being soluble in said liquid vehicle at elevated temperatures and insoluble in said liquid vehicle at ambient temperatures, subsequently adding pigment particles to the resulting solution, attriting the resulting mixture for from about 20 to about 75 minutes, cooling the mixture to ambient temperature with continuous mixing, and subsequently adding to the solution a charge control additive.
Claim 44
Dependent Claim
99 words
A process for preparing a liquid developer composition which comprises dissolving in a liquid vehicle at temperatures of from about 80° C. to about 120° C. a resin selected from the group consisting of polyolefins, halogenated polyolefins, and mixtures thereof, said resin being soluble in said liquid vehicle at elevated temperatures and insoluble in said liquid vehicle at ambient temperatures, subsequently adding pigment particles to the resulting solution, attriting the resulting mixture for from about 20 to about 75 minutes, cooling the mixture to ambient temperature with continuous mixing, and subsequently adding to the solution a charge control additive.
Claim 45
Dependent Claim
25 words
A process according to claim 39 wherein the mixture is cooled to ambient temperature over a period of from about 1 to about 3 hours.
Claim 46
Dependent Claim
22 words
A process according to claim 39 wherein the resin is selected from the group consisting of poly-α-olefins, chlorinated polypropylenes, and mixtures thereof.
Claim 47
Dependent Claim
71 words
A liquid developer composition consisting essentially of a liquid vehicle, a charge control additive, and toner particles containing pigment particles and a resin selected from the group consisting of poly-α-olefins, chlorinated polypropylenes, and mixtures thereof, said resin being soluble in said liquid vehicle at temperatures of from about 75° C. to about 125° C. and insoluble in said liquid vehicle at temperatures of from about 10° C. to about 65° C.
Claim 48
Dependent Claim
71 words
A liquid developer composition consisting essentially of a liquid vehicle, a charge control additive, and toner particles containing pigment particles and a resin selected from the group consisting of poly-α-olefins, chlorinated polypropylenes, and mixtures thereof, said resin being soluble in said liquid vehicle at temperatures of from about 75° C. to about 125° C. and insoluble in said liquid vehicle at temperatures of from about 10° C. to about 65° C.
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) | 1994-07-08 | 1995-01-07 | 1995-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-08 | 1999-01-07 | 1999-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-08 | 2003-01-07 | 2003-07-09 | $7700.00 | Window Closed / Lapsed |