Claims
- 1. A liquid toner for use in imaging processes at a given intermediate transfer member temperature from the intermediate transfer member to a substrate, said liquid toner comprising pigmented polymer particles, at least one charge director and a hydrocarbon carrier liquid, wherein the polymer comprised in said particles is a blend of at least two distinct polymer components, the blend being characterized in that in a 40% non-volatile mixture with the carrier liquid, the blend has, on a semi-logarithmic viscosity vs. temperature cooling curve, a transition at a temperature below about 65.degree. C. at a viscosity of between about 3.times.10.sup.5 centipoises and about 5.times.10.sup.6 centipoises, wherein at temperatures below the transition temperature, the rate of change of viscosity with temperature is higher than the rate of change at temperatures above the transition temperature.
- 2. A liquid toner according to claim 1 wherein at least one polymer component of the polymer particles does not have, in a 40% non-volatile mixture with the carrier liquid, on a semi-logarithmic viscosity vs. temperature cooling curve, a transition at a temperature below about 65.degree. C. at a viscosity of between about 3.times.10.sup.5 centipoises and about 5.times.10.sup.6 centipoises, wherein at temperatures below the transition temperature, the rate of change of viscosity with temperature is higher than the rate of change at temperatures above the transition temperature.
- 3. A liquid toner according to claim 2 wherein a second polymer component of the polymer particles does not have, in a 40% non-volatile mixture with the carrier liquid, on a semi-logarithmic viscosity vs. temperature cooling curve, a transition at a temperature below about 65.degree. C. at a viscosity of between about 3.times.10.sup.5 centipoises and about 5.times.10.sup.6 centipoises, wherein at temperatures below the transition temperature, the rate of change of viscosity with temperature is higher than the rate of change at temperatures above the transition temperature.
- 4. An electrostatic imaging process comprising:
- forming an image on a first surface utilizing a liquid toner according to claim 3; and
- transferring the image to a final substrate and fusing the image thereon.
- 5. An electrostatic imaging process comprising:
- forming an image on a first surface utilizing a liquid toner according to claim 2; and
- transferring the image to a final substrate and fusing the image thereon.
- 6. An electrostatic imaging process comprising:
- forming an image on a first surface utilizing a liquid toner according to claim 1; and
- transferring the image to a final substrate and fusing the image thereon.
- 7. A liquid toner for use in imaging processes at a given intermediate transfer member temperature from the intermediate transfer member to a substrate, said liquid toner comprising pigmented polymer particles, at least one charge director and a hydrocarbon carrier liquid, wherein the polymer comprised in said particles is a blend of at least two distinct polymer components, the blend being characterized in that in a 40% non-volatile mixture with the carrier liquid, the blend has, on a semi-logarithmic viscosity vs. temperature cooling curve, a transition at a temperature below about 65.degree. C. at a viscosity of between about 3.times.10.sup.5 centipoises and about 5.times.10.sup.6 centipoises, wherein at temperatures below the transition temperature, the rate of change of viscosity with temperature is higher than the rate of change at temperatures above the transition temperature;
- at least a first polymer component of the polymer particles and a second polymer component of the polymer particles do not have, in a 40% non-volatile mixture with the carrier liquid, on a semi-logarithmic viscosity vs. temperature cooling curve, a transition at a temperature below about 65.degree. C. at a viscosity of between about 3.times.10.sup.5 centipoises and about 5.times.10.sup.6 centipoises, wherein at temperatures below the transition temperature, the rate of change of viscosity with temperature is higher than the rate of change at temperatures above the transition temperature; and
- said first polymer component is an ionomer derived from ethylene/methacrylic acid copolymers and said second polymer component is an ethylene/vinyl acetate/acid terpolymer.
- 8. A liquid toner according to claim 7 wherein said at least one polymer component is present in a range of 25-80% by weight and said second polymer component is present in a range of 20% to 75% by weight.
- 9. An electrostatic imaging process comprising:
- forming an image on a first surface utilizing a liquid toner according to claim 8; and
- transferring the image to a final substrate and fusing the image thereon.
- 10. An electrostatic imaging process comprising:
- forming an image on a first surface utilizing a liquid toner according to claim 7; and
- transferring the image to a final substrate and fusing the image thereon.
Parent Case Info
This application is a continuation of application Ser. No. 07/676,422, filed Mar. 28, 1991, now abandoned.
US Referenced Citations (9)
Foreign Referenced Citations (4)
Number |
Date |
Country |
0305524 |
Mar 1989 |
EPX |
0373652 |
Jun 1990 |
EPX |
890112258 |
Dec 1989 |
WOX |
9004216 |
Apr 1990 |
WOX |
Non-Patent Literature Citations (2)
Entry |
English Abstract of Japanese Patent Document No. 63-058356. |
International Search Report and Annex. |
Continuations (1)
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Number |
Date |
Country |
Parent |
676422 |
Mar 1991 |
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