Patent US3901700A successfully refreshed from Google Patents.
US3901700A
Expired / Lapsed
US
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Repellent compositions of fluorinated polymers and oils in electrophotographic processes
Assignee: Eastman Kodak Co
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Filing: 1974-08-13
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Granted: 1975-08-26
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Expires: 1994-08-13
Abstract
Abstract A repellent composition containing an oil of low volatility having a surface energy less than 27 dynes/cm. and a solid fluorinated polymer such as a polymer of a fluoroalkyl acrylate. In accord with certain embodiments of the invention, a resinous binder and/or a particulate fluorocarbon powder may be added to the repellent composition. The repellent composition may be used to prepare an ink repellent surface for a ''''waterless'''' lithoplate or as a coating on the surface of an electrographic element from which a liquid developed electrographic image is transferred.
Inventors
- 👤 William E Yoerger
- 👤 John M Mccabe
- 👤 John F Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:55
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/14; G03G5/147; G03G5/14708; G03G5/14713; G03G5/14786; G03G13/00; G03G13/26; G03G13/28; G03G13/286; G03G5/02; G03G5/0202; G03G5/0205; G03G5/0208; G03G5/14717; G03G5/14726; G03G5/14734
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
102 words
AN ELECTROGRAPHIC ELEMENT HAVING A CONDUCTIVE SUPPORT BEARING A REPELLENT COMPOSITION COMPRISING FROM ABOUT 1 TO ABOUT 40 PERCENT BY WEIGHT OF AN OIL OF LOW VOLATILITY HVING A SURFACE ENERGY LESS THAN ABOUT 27 DYNES/CM SELECTED FROM THE GROUP CONSISTING OF FLUORINATED OILS AND POLY(SILOXANE) OILS, FROM 50 TO ABOUT 80 PERCENT BY WEIGHT OF A POLYMERIC BINDER SELECTED FROM THE GROUP CONSISTING OF SILICONE RESINS POLY(ACRYLIC ESTER) RESINS, AND POLY(METHACRYLIC ESTER) RESINS FLUORINATED HYDROCARBON RESINS AND MIXTURES THEREOF, AND FROM ABOUT 5 TO ABOUT 98 PERCENT BY WEIGHT OF A SOLID FLUORINATED POLYMER HAVING REPEATING UNITS OF THE FOLLOWING FORMULA:
Claim 2
Dependent Claim
102 words
AN ELECTROGRAPHIC ELEMENT HAVING A CONDUCTIVE SUPPORT BEARING A REPELLENT COMPOSITION COMPRISING FROM ABOUT 1 TO ABOUT 40 PERCENT BY WEIGHT OF AN OIL OF LOW VOLATILITY HVING A SURFACE ENERGY LESS THAN ABOUT 27 DYNES/CM SELECTED FROM THE GROUP CONSISTING OF FLUORINATED OILS AND POLY(SILOXANE) OILS, FROM 50 TO ABOUT 80 PERCENT BY WEIGHT OF A POLYMERIC BINDER SELECTED FROM THE GROUP CONSISTING OF SILICONE RESINS POLY(ACRYLIC ESTER) RESINS, AND POLY(METHACRYLIC ESTER) RESINS FLUORINATED HYDROCARBON RESINS AND MIXTURES THEREOF, AND FROM ABOUT 5 TO ABOUT 98 PERCENT BY WEIGHT OF A SOLID FLUORINATED POLYMER HAVING REPEATING UNITS OF THE FOLLOWING FORMULA:
Claim 3
Dependent Claim
82 words
An electrophotographic element having a conductive support, a photoconductive layer thereover, and a repellent composition over said photoconductive layer, said repellent composition comprising from about 2.5 to about 40 percent by weight of a fluorinated oil having a surface energy less than about 27 dynes/cm, from about 50 to about 80 percent by weight of a fluorinated hydrocarbon resinous binder, and from about 5 to about 30 percent by weight of a solid fluorinated polymer having repeating units of the following formula:
Claim 4
Dependent Claim
82 words
An electrophotographic element having a conductive support, a photoconductive layer thereover, and a repellent composition over said photoconductive layer, said repellent composition comprising from about 2.5 to about 40 percent by weight of a fluorinated oil having a surface energy less than about 27 dynes/cm, from about 50 to about 80 percent by weight of a fluorinated hydrocarbon resinous binder, and from about 5 to about 30 percent by weight of a solid fluorinated polymer having repeating units of the following formula:
Claim 5
Dependent Claim
18 words
The element of claim 2 wherein said repellent composition comprises a minor amount of a particulate fluorocarbon powder.
Claim 6
Dependent Claim
145 words
IN AN ELECTROGRAPHIC IMAGE TRANSFER POCESS WHEREIN A LIQUID-DEVELOPED TONER PARTICLE IMAGE FORMED A DIELECTRIC SURFACE BEARING AN ELECTROSTATIC CHARGE PATTERN IS TRANSFERRED TO A RECEIVING SHEET BY (A) CONTACTING TOGETHER THE TONER IMAGE AND RECEIVING SHEET WHILE THE TONER IMAGE IS WET WITH THE ELECTRICALLY INSULATING CARRIER LIQUID OF SAID LIQUID DEVELOPER AND (B) APPLYING A TRANSFER POTENTIAL TO THE TONER IMAGE DURING SAID CONTACT, THE IMPROVEMENT WHEREIN THE DIELECTRIC SURFACE ON WHICH THE TONER IMAGE IS DEVELOPED IS OVERCOATED WITH A REPELLENT COMPOSITION COMPRISING FROM ABOUT 2.5 TO ABOUT 40 PERCENT BY WEIGHT OF A FLUORINATED OIL HAVING A SURFACE ENERGY LESS THAN ABOUT 27 DYNES/CM, FROM ABOUT 50 TO ABOUT 80 PERCENT BY WEIGHT OF A FLUORINATED HYDROCARBON RESINOUS BINDER, AND FROM AT 5 TO ABOUT 30 PERCENT BY WEIGHT OF A SOLID FLUORINATED POLYMER HAVING REPEATING UNITS OF THE FOLLOWING FORMULA:
Claim 7
Dependent Claim
145 words
IN AN ELECTROGRAPHIC IMAGE TRANSFER POCESS WHEREIN A LIQUID-DEVELOPED TONER PARTICLE IMAGE FORMED A DIELECTRIC SURFACE BEARING AN ELECTROSTATIC CHARGE PATTERN IS TRANSFERRED TO A RECEIVING SHEET BY (A) CONTACTING TOGETHER THE TONER IMAGE AND RECEIVING SHEET WHILE THE TONER IMAGE IS WET WITH THE ELECTRICALLY INSULATING CARRIER LIQUID OF SAID LIQUID DEVELOPER AND (B) APPLYING A TRANSFER POTENTIAL TO THE TONER IMAGE DURING SAID CONTACT, THE IMPROVEMENT WHEREIN THE DIELECTRIC SURFACE ON WHICH THE TONER IMAGE IS DEVELOPED IS OVERCOATED WITH A REPELLENT COMPOSITION COMPRISING FROM ABOUT 2.5 TO ABOUT 40 PERCENT BY WEIGHT OF A FLUORINATED OIL HAVING A SURFACE ENERGY LESS THAN ABOUT 27 DYNES/CM, FROM ABOUT 50 TO ABOUT 80 PERCENT BY WEIGHT OF A FLUORINATED HYDROCARBON RESINOUS BINDER, AND FROM AT 5 TO ABOUT 30 PERCENT BY WEIGHT OF A SOLID FLUORINATED POLYMER HAVING REPEATING UNITS OF THE FOLLOWING FORMULA:
Claim 8
Dependent Claim
158 words
In an electrographic image transfer process wherein a liquid-developed toner particle image formed on a dielectric surface bearing an electrostatic charge pattern is transferred to a receiving sheet by (a) contacting together the toner image and receiving sheet while the toner image is wet with the electrically insulating carrier liquid of said liquid developer and (b) applying a transfer potential to the toner image during said contact, the improvement wherein the surface of the receiving sheet has an oil-repellent sizing and wherein the dielectric surface on which the toner image is developed is overcoated with a repellent composition comprising from about 2.5 to about 40 percent by weight of a fluorinated oil having a surface energy less than about 27 dynes/cm, from about 50 to about 80 percent by weight of a fluorinated hydrocarbon resinous binder, and from about 5 to about 30 percent by weight of a solid fluorinated polymer having repeating units of the following formula:
Claim 9
Dependent Claim
158 words
In an electrographic image transfer process wherein a liquid-developed toner particle image formed on a dielectric surface bearing an electrostatic charge pattern is transferred to a receiving sheet by (a) contacting together the toner image and receiving sheet while the toner image is wet with the electrically insulating carrier liquid of said liquid developer and (b) applying a transfer potential to the toner image during said contact, the improvement wherein the surface of the receiving sheet has an oil-repellent sizing and wherein the dielectric surface on which the toner image is developed is overcoated with a repellent composition comprising from about 2.5 to about 40 percent by weight of a fluorinated oil having a surface energy less than about 27 dynes/cm, from about 50 to about 80 percent by weight of a fluorinated hydrocarbon resinous binder, and from about 5 to about 30 percent by weight of a solid fluorinated polymer having repeating units of the following formula:
Claim 10
Dependent Claim
19 words
The transfer process of claim 5 wherein said repellent composition comprises a minor amount of a particulate fluorocarbon powder.
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) | 1978-08-25 | 1979-02-24 | 1979-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-25 | 1983-02-24 | 1983-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-25 | 1987-02-24 | 1987-08-26 | $7700.00 | Window Closed / Lapsed |