Ink compositions

• US 5,989,325 A
• Filed: 03/05/1998
• Issued: 11/23/1999
• Est. Priority Date: 03/05/1998
• Status: Expired due to Term

• Current Assignee: Xerox Corporation (Xerox Holdings Corp.)
• Original Assignee: Xerox Corporation (Xerox Holdings Corp.)
• Inventors: Sacripante, Guerino G., Goodbrand, H. Bruce, Boils, Danielle C.
• Primary Examiner(s): KLEMANSKI, HELENE G
• Application Number:
  US09/035,545
• Time in Patent Office: 628 Days
• Field of Search: 106/31.29, 106/31.3, 106/31.58, 106/31.61, 106/31.62, 106/31.86, 106/31.27, 106/31.6
• US Class Current: 106/31.27
• CPC Class Codes: C09D 11/34 Hot-melt inks

Abstract

A nonaqueous ink composition comprised of a vehicle, colorant, and a hydrophobic gelling component.

Claims

1. A nonaqueous ink composition comprised of a vehicle, colorant, and a hydrophobic gelling component, and wherein said hydrophobic gelling component is of the formula ##STR2## wherein R is alkyl, aryl, alkoxy, hydrogen, halide, or hydrocarbon halide.

2. An ink composition in accordance with claim 1, wherein said vehicle is a solid of a hydrocarbon wax, an oxazoline, a benzoxazoline, an amide ester or an amino ester.

3. An ink composition in accordance with claim 2, wherein said oxazoline is selected from the group consisting of 2-stearyl-5-ethyl-5-methoxystearate-oxazoline, 2-stearyl-5-ethyl-5-hydroxymethyl-oxazoline, 2-stearyl-4-ethyl-oxazoline, 2-stearyl-4-methoxystearate-oxazoline, 2-stearyl-4-hydroxymethyl-oxazoline, 2-stearyl-4-hydroxymethyl-bis-5,5-(methoxystearate)-oxazoline, 2-stearyl-5-hydroxymethyl-5-(methoxystearate)-oxazoline, and 2-stearyl-benzoxazoline.

4. An ink composition in accordance with claim 1, wherein the vehicle is a hydrocarbon wax with from about 18 to about 1,000 carbon atoms.

5. An ink in accordance with claim 1, wherein said alkyl and said alkoxy contains about 1 to about 25 carbon atoms, and said aryl contains about 6 to about 30 carbon atoms.

6. An ink in accordance with claim 1 wherein said gelling component is trans 4-tertiary-butyl-1-phenyl-cyclohexanol.

7. An ink composition comprised of a vehicle, colorant, and an aklylarylcycloalkanol gelling component.

8. An ink in accordance with claim 7, wherein said gelling component is trans 4-tertiary-butyl-1-phenyl-cyclohexanol.

9. An ink in accordance with claim 7, wherein said gelling component is present in an amount of from about 0.5 to about 10 weight percent.

10. An ink in accordance with claim 9, wherein said gelling component is trans-4-t-butyl-1-phenylcyclohexanol.

11. An ink in accordance with claim 7, wherein said gelling component is present in an amount of from about 0.5 to about 3 weight percent.

12. An ink in accordance with claim 8, wherein said gelling component is present in an amount of from about 0.5 to about 10 weight percent.

13. An ink in accordance with claim 8, wherein said gelling component is present in an amount of from about 0.5 to about 2 weight percent.

14. An ink in accordance with claim 7, wherein said vehicle is a liquid at ambient temperature.

15. An ink composition in accordance with claim 14, wherein the vehicle is a liquid of heptane, octane, nonane, dodecane, toluene, xylene, terpine, or naphtha.

16. An ink composition in accordance with claim 14, wherein the vehicle is a mixture of a liquid vehicle and a solid vehicle.

17. An ink composition in accordance with claim 7, wherein the ink viscosity is from about 1 centipoise to about 10 centipoise at a temperature of from about 50 to about 120°

Centigrade, and wherein the ink is a solid at room temperature of from about 20°

C. to about 40°

C.

18. An ink composition in accordance with claim 7, wherein said colorant is a dye present in an amount of from about 0.05 to about 20 weight percent, and wherein said colorant is a dye of cyan, magenta, yellow, blue, green, brown, black, or mixtures thereof.

19. An ink in accordance with claim 7 wherein said colorant is a dye present in an amount of from about 1 to about 5 weight percent.

20. A printing process which comprises incorporating into an acoustic ink jet printer an ink comprised of a vehicle, colorant, and a hydrophobic gelling component, and wherein said hydrophobic gelling component is of the formula ##STR3## wherein R is alkyl, aryl, alkoxy, hydrogen, halide, or hydrocarbon halide.

21. A process in accordance with claim 20, wherein said ink is nonaqueous and wherein said ink possesses a viscosity of about 1 centipoise to about 25 centipoise at a temperature of from about 50°

C. to about 125°

C.

22. A process which comprises (a) providing an acoustic ink printer having a pool of liquid ink with a free surface, and a printhead including at least one droplet ejector for radiating the free surface of said ink with focused acoustic radiation to eject individual droplets of ink therefrom on demand, said radiation being brought to focus with a finite waist diameter in a focal plane, said ink comprising a vehicle, colorant, and a hydrophobic gelling component and (b) causing droplets of said ink to be ejected onto a recording sheet in an imagewise pattern at a temperature of from about 50°

C. to about 125°

C., and wherein said hydrophobic gelling component is of the formula ##STR4## wherein R is alkyl, aryl, alkoxy, hydrogen, halide, or hydrocarbon halide.

23. A process in accordance with claim 22, wherein said ink is nonaqueous and wherein said ink possesses a viscosity of from about 1 centipoise to about 25 centipoise at a temperature of from about 50°

C. to about 125°

C.

24. An ink composition comprised of a colorant, a component of the following formula, and an ink vehicle ##STR5## wherein R is alkyl, aryl, alkoxy, hydrogen, halide, or hydrocarbon halide.

25. An ink in accordance with claim 24, wherein said component is trans 4-tertiary-butyl-1-phenyl-cyclohexanol, said vehicle is an oxazoline or benzoxazoline, and which ink possesses a viscosity of from about 1 centipoise to about 25 centipoise at a temperature of from about 50°

C. to about 125°

C.

26. An ink comprised of a vehicle, a colorant, and a hydrophobic gelling component of the formula ##STR6## wherein R is a halide.

27. An ink comprised of a vehicle, a colorant, and a hydrophobic gelling component of the formula ##STR7## wherein R is a alkyl or alkoxy.

28. An ink comprised of a vehicle, a colorant, and a hydrophobic gelling component of the formula ##STR8## wherein R is aryl.