US4407922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure sensitive toner compositions
Assignee: Xerox Corp
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Filing: 1982-01-11
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Granted: 1983-10-04
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Expires: 2002-01-11
Abstract
Abstract This invention is directed to an improved cold pressure flexible toner composition comprised of a blend of two immiscible polymers selected from the group consisting of (1) a polymer of polystyene-co-stearylmethacrylate as a hard component, and poly[octadecyl vinyl ether-co-maleic anhydride] as a soft component, and (2) polyisobutylmethacrylate composition as a hard component, and poly[octadecyl vinyl ether-co-maleic anhydride], as a soft component, the soft component being present in an amount of from about 35 percent by weight to about 75 percent by weight, and the hard component being present in an amount of from about 25 weight percent to about 65 weight percent; and the use of such compositions for developing images in electrostatographic imaging systems.
Inventors
- 👤 Bernard Grushkin
- 👤 Jacques C. Bertrand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:24
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/087; G03G9/08702; G03G9/08726; G03G9/08731; G03G9/08706; G03G9/08708; G03G9/08711; G03G9/08722; G03G9/08728
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
171 words
An improved cold pressure fixable toner composition comprised of a blend of two immiscible polymers selected from the group consisting of (1) a polymer of polystyrene-co-stearylmethacrylate as a hard component, having a number average molecular weight of from about 8,000 to about 20,000, and a glass transition temperature within the range of from about 50 degrees Centigrade to about 65 degrees Centigrade, and poly[octadecyl vinyl ether-co-maleic anhydride], having a number average molecular weight of from about 5,000 to about 20,000, as a soft component, and (2) polyisobutylmethacrylate compositions as a hard component, having a number average molecular weight of from about 100,000 to about 200,000, and a glass transition temperature of from about 50 degrees Centigrade to about 60 degrees Centigrade, and poly[octadecyl vinyl ether-co-maleic anhydride] as a soft component, the soft component being present in an amount of from about 35 percent by weight to about 75 percent by weight, and the hard component being present in an amount of from about 25 weight percent to about 65 weight percent.
Claim 2
Dependent Claim
171 words
An improved cold pressure fixable toner composition comprised of a blend of two immiscible polymers selected from the group consisting of (1) a polymer of polystyrene-co-stearylmethacrylate as a hard component, having a number average molecular weight of from about 8,000 to about 20,000, and a glass transition temperature within the range of from about 50 degrees Centigrade to about 65 degrees Centigrade, and poly[octadecyl vinyl ether-co-maleic anhydride], having a number average molecular weight of from about 5,000 to about 20,000, as a soft component, and (2) polyisobutylmethacrylate compositions as a hard component, having a number average molecular weight of from about 100,000 to about 200,000, and a glass transition temperature of from about 50 degrees Centigrade to about 60 degrees Centigrade, and poly[octadecyl vinyl ether-co-maleic anhydride] as a soft component, the soft component being present in an amount of from about 35 percent by weight to about 75 percent by weight, and the hard component being present in an amount of from about 25 weight percent to about 65 weight percent.
Claim 3
Dependent Claim
23 words
A toner composition in accordance with claim 1 wherein the blend of immiscible polymers is comprised of polystyrene-co-stearylmethacrylate, and poly[octadecyl vinyl ether-co-maleic anhydride].
Claim 4
Dependent Claim
24 words
A toner composition in accordance with claim 1 wherein the blend of immiscible polymers is selected from polyisobutylmethacrylate compositions, and poly[octadecyl vinyl ether-co-maleic anhydride].
Claim 5
Dependent Claim
35 words
A toner composition in accordance with claim 1 wherein the soft component is present in an amount of 65 percent by weight, and the hard component is present in an amount of 35 weight percent.
Claim 6
Dependent Claim
216 words
An improved toner composition useful in cold pressure fixable imaging systems comprised of a blend of two immiscible polymers selected from the group consisting of (1) a polymer of polystyrene-co-stearylmethacrylate as a hard component, having a number average molecular weight of from about 8,000 to about 20,000, and a glass transition temperature within the range of from about 50 degrees Centigrade to about 65 degrees Centigrade, and poly[octadecyl vinyl ether-co-maleic anhydride] having a molecular weight of from about 5,000 to about 20,000 as a soft component, and (2) polyisobutylmethacrylate compositions as a hard component, having a number average molecular weight of from about 100,000 to about 200,000, and a glass transition temperature of from about 50 degrees Centigrade to about 60 degrees Centigrade, and poly[octadecyl vinyl ether-co-maleic anhydride] as a soft component, and further including in the soft component a plasticizer, the soft component being present in an amount of from about 35 percent by weight to about 75 percent by weight, the hard component being present in an amount of from about 25 percent by weight to about 65 percent by weight, and the plasticizer being present in the soft component in an amount of from about 5 percent by weight to about 20 percent by weight based on the weight of the soft components.
Claim 7
Dependent Claim
216 words
An improved toner composition useful in cold pressure fixable imaging systems comprised of a blend of two immiscible polymers selected from the group consisting of (1) a polymer of polystyrene-co-stearylmethacrylate as a hard component, having a number average molecular weight of from about 8,000 to about 20,000, and a glass transition temperature within the range of from about 50 degrees Centigrade to about 65 degrees Centigrade, and poly[octadecyl vinyl ether-co-maleic anhydride] having a molecular weight of from about 5,000 to about 20,000 as a soft component, and (2) polyisobutylmethacrylate compositions as a hard component, having a number average molecular weight of from about 100,000 to about 200,000, and a glass transition temperature of from about 50 degrees Centigrade to about 60 degrees Centigrade, and poly[octadecyl vinyl ether-co-maleic anhydride] as a soft component, and further including in the soft component a plasticizer, the soft component being present in an amount of from about 35 percent by weight to about 75 percent by weight, the hard component being present in an amount of from about 25 percent by weight to about 65 percent by weight, and the plasticizer being present in the soft component in an amount of from about 5 percent by weight to about 20 percent by weight based on the weight of the soft components.
Claim 8
Dependent Claim
31 words
A toner composition in accordance with claim 5 wherein the blend of immiscible polymers is comprised of polystyrene-co-stearylmethacrylate, and poly[octadecyl vinyl ether-co-maleic anhydride], and the plasticizer is a poly[12-hydroxy stearic acid].
Claim 9
Dependent Claim
30 words
A toner composition in accordance with claim 5 wherein the immiscible polymers are comprised of polyisobutylmethacrylate compositions, and poly[octadecyl vinyl ether-co-maleic anhydride], and the plasticizer is a poly[12-hydroxy stearic acid].
Claim 10
Dependent Claim
35 words
A toner composition in accordance with claim 5 wherein the plasticizer is present in an amount of from about 13 weight percent to about 15 weight percent, based on the weight of the soft component.
Claim 11
Dependent Claim
12 words
A toner composition in accordance with claim 1 further including a colorant.
Claim 12
Dependent Claim
12 words
A toner composition in accordance with claim 5 further including a colorant.
Claim 13
Dependent Claim
16 words
A toner composition in accordance with claims 9 or 10, wherein the colorant is carbon black.
Claim 14
Independent Claim
201 words
A method of developing images in an electrostatographic imaging system which comprises, causing the formation of an electrostatic latent image on an imaging surface, developing the image with a toner composition comprised of a blend of immiscible polymers selected from the group consisting of (1) polystyrene-co-stearylmethacrylate as a hard component having a number average molecular weight of from about 8,000 to about 20,000, and a glass transition temperature within the range of from about 50 degrees Centigrade to about 65 degrees Centigrade, and poly[octadecyl vinyl ether-co-maleic anhydride] having a molecular weight of from about 5,000 to about 20,000 as a soft component, and (2) polyisobutylmethacrylate compositions as a hard component having a number average molecular weight of from about 100,000 to about 200,000, and a glass transition temperature of from about 50 degrees Centigrade to about 60 degrees Centigrade, and poly[octadecyl vinyl ether-co-maleic anhydride] as a soft component, the soft component being present in an amount of about 35 weight percent to about 75 weight percent, and the hard component being present in an amount of from about 25 weight percent to about 65 weight percent, followed by transferring the image to a permanent substrate, and permanently fixing the image thereon.
Claim 15
Independent Claim
201 words
A method of developing images in an electrostatographic imaging system which comprises, causing the formation of an electrostatic latent image on an imaging surface, developing the image with a toner composition comprised of a blend of immiscible polymers selected from the group consisting of (1) polystyrene-co-stearylmethacrylate as a hard component having a number average molecular weight of from about 8,000 to about 20,000, and a glass transition temperature within the range of from about 50 degrees Centigrade to about 65 degrees Centigrade, and poly[octadecyl vinyl ether-co-maleic anhydride] having a molecular weight of from about 5,000 to about 20,000 as a soft component, and (2) polyisobutylmethacrylate compositions as a hard component having a number average molecular weight of from about 100,000 to about 200,000, and a glass transition temperature of from about 50 degrees Centigrade to about 60 degrees Centigrade, and poly[octadecyl vinyl ether-co-maleic anhydride] as a soft component, the soft component being present in an amount of about 35 weight percent to about 75 weight percent, and the hard component being present in an amount of from about 25 weight percent to about 65 weight percent, followed by transferring the image to a permanent substrate, and permanently fixing the image thereon.
Claim 16
Dependent Claim
34 words
A method of imaging in accordance with claim 12 wherein fixing is accomplished by pressure rollers at a pressure of from about 460 pounds per linear inch to about 900 pounds per linear inch.
Claim 17
Dependent Claim
29 words
A method of imaging in accordance with claim 9 wherein the immiscible polymer blend is comprised of a polystyrene-co-stearylmethacrylate hard component, and a poly[octadecyl vinyl ether-co-maleic anhydride] soft component.
Claim 18
Dependent Claim
28 words
A method of imaging in accordance with claim 12 wherein the immiscible polymer blend is a polyisobutylmethacrylate polymer hard component and a poly[octadecyl vinyl ether-co-maleic anhydride] soft component.
Claim 19
Dependent Claim
40 words
A method of imaging in accordance with claim 12 wherein the toner compositions employed further includes a plasticizer in the soft component, said plasticizer being present in an amount of from about 5 weight percent to about 20 weight percent.
Claim 20
Dependent Claim
28 words
A method of imaging in accordance with claim 16 wherein the plasticizer is present in an amount of from about 13 weight percent to about 15 weight percent.
Claim 21
Dependent Claim
16 words
A method of imaging in accordance with claim 16 wherein the plasticizer is a poly[12-hydroxystearic acid].
Claim 22
Dependent Claim
17 words
A method of imaging in accordance with claim 12 wherein the toner composition further includes a colorant.
Claim 23
Dependent Claim
17 words
A method of imaging in accordance with claim 16 wherein the toner composition further includes a colorant.
Claim 24
Independent Claim
17 words
A method of imaging in accordance with claims 19 or 20 wherein the colorant is carbon black.
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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) | 1986-10-03 | 1987-04-04 | 1987-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-03 | 1991-04-04 | 1991-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-03 | 1995-04-04 | 1995-10-04 | $7700.00 | Window Closed / Lapsed |