Oxazoline hot melt ink compositions

• US 5,817,169 A
• Filed: 10/31/1997
• Issued: 10/06/1998
• Est. Priority Date: 09/27/1996
• Status: Expired due to Term

• Current Assignee: Oxford Road
• Original Assignee: Xerox Corporation (Xerox Holdings Corp.)
• Inventors: Boils-Boissier, Daniele C., Sacripante, Guerino G., Drappel, Stephan V., Pontes, Fatima M.
• Primary Examiner(s): KLEMANSKI, HELENE G
• Application Number:
  US08/962,020
• Time in Patent Office: 340 Days
• Field of Search: 106/31.29, 106/31.35, 106/31.49, 106/31.61, 106/31.67, 106/31.78, 106/31.43, 106/31.75
• US Class Current: 106/31.43
• CPC Class Codes: C09D 11/34 Hot-melt inks

Abstract

An ink composition comprised of a colorant and a vehicle component, and which vehicle component is comprised of the condensation product of an organic acid and an amino alcohol.

Claims

1. An ink composition comprised of a colorant and a vehicle component, and which vehicle component is comprised of the condensation product of an organic acid and an amino alcohol, and a mixture of an amide and an amino ester, and wherein said mixture contains from about 1 to about 99 parts of said amide and from about 99 parts to about 1 part of said ester.

2. An ink in accordance with claim 1 wherein said amide is represented by Formulas II, or IIa ##STR6## wherein R1 is an alkyl group of from about 1 to about 55 carbon atoms, R₂, R₃, R₄ and R₅ are an alkyl, an alkyl alcohol or an alkyl ester group, each alkyl containing from about 1 to about 55 carbon atoms.

3. An ink in accordance with claim 2 wherein R₂, R₃, R₄ and R₅ are the alkyl alcohol --(CH₂)_n --OH wherein n is an integer of from about 1 to about 6, or the alkyl ester --(CH₂)n-O₂ C--(CH₂)_m CH₃ wherein n is an integer of from about 1 to about 6, and m is an integer of from about 1 to about 53.

4. An ink in accordance with claim 1 wherein said amino ester is represented by Formula III ##STR7## wherein R₁ is an alkyl group of from about 1 to about 55 carbon atoms, R₂, R₃, R₄ and R₅ are alkyl, an alkyl alcohol or an alkyl ester, each with from about 1 to about 55 carbon atoms.

5. An ink in accordance with claim 4 wherein R₁ is an alkyl group of from about 1 to about 55 carbon atoms, R₂, R₃, R₄ and R₅ are alkyl, an alkyl alcohol or an alkyl ester, each with from about 1 to about 55 carbon atoms.

6. An ink in accordance with claim 1 wherein said colorant is a dye.

7. An ink in accordance with claim 1 wherein said colorant is a pigment.

8. An ink in accordance with claim 1 wherein said colorant is comprised of mixtures of dyes and pigments.

9. An ink in accordance with claim 1 wherein said colorant is present in an amount of about 0.01 to about 10 percent by weight.

10. An ink in accordance with claim 1 wherein said colorant is present in an amount of about 1 to about 5 percent by weight.

11. An ink in accordance with claim 1 possessing a viscosity of about 1 to about 25 centipoise at a temperature of about 125°

C. to about 185°

C.

12. An ink in accordance with claim 1 possessing a viscosity of about 1 to about 10 centipoise at a temperature of about 120°

C. to about 150°

C.

13. An ink in accordance with claim 1 with about 85 to about 97 percent by weight of said vehicle, and about 3 to about 15 percent by weight of said colorant.

14. An ink in accordance with claim 1 wherein said condensation product is present in an amount of from about 65 to about 99 weight percent, and said mixture of amide and amino ester is present in an amount of from about 1 to about 35 weight percent.

15. 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, and wherein said ink composition selected is comprised of a colorant, and a vehicle component, and which vehicle component is comprised of the condensation product of an organic acid and an amino alcohol;

and (b) causing droplets of said ink to be ejected onto a recording sheet in an imagewise pattern at a temperature of from about 120°

C. to about 185°

C.

17. A process in accordance with claim 15 wherein said ink further contains an amide and/or an amino ester.

18. A process in accordance with claim 15 wherein said mixture contains from about 1 to about 99 parts of said amide, and from about 99 parts to about 1 part of said ester.

19. A process in accordance with claim 17 wherein said amide is represented by Formulas II or IIa ##STR8## wherein R₁ is an alkyl group of from about 1 to about 55 carbon atoms, R₂, R₃, R₄ and R₅ are an alkyl, an alkyl alcohol or an alkyl ester group, each alkyl containing from about 1 to about 55 carbon atoms;

and said amino ester is represented by Formula III ##STR9## wherein R₁ is an alkyl group of from about 1 to about 55 carbon atoms, R₂, R₃, R₄ and R₅ are alkyl, an alkyl alcohol or an alkyl ester, each with from about 1 to about 55 carbon atoms.

20. A process in accordance with claim 15 wherein the colorant is a pigment.

21. A process in accordance with claim 15 wherein the colorant is a dye.

16. A printing process which comprises incorporating into an acoustic ink jet printer an ink and wherein said ink composition selected is comprised of a colorant and a vehicle component, and which vehicle component is comprised of the condensation product of an organic acid and an amino alcohol.