Ink jet ink formulations containing modified carbon products

• US 5,630,868 A
• Filed: 12/14/1995
• Issued: 05/20/1997
• Est. Priority Date: 12/15/1994
• Status: Expired due to Term

• Current Assignee: Cabot Corporation
• Original Assignee: Cabot Corporation
• Inventors: Johnson, Joseph E., Adams, Curtis F., Belmont, James A.
• Primary Examiner(s): KLEMANSKI, HELENE G
• Application Number:
  US08/572,545
• Time in Patent Office: 523 Days
• Field of Search: 106/20 R, 106/23 R, 106/476
• US Class Current: 106/31.75
• CPC Class Codes: C01P 2004/01 depicted by an image
• CPC Class Codes: C01P 2006/12 Surface area
• CPC Class Codes: C01P 2006/14 Pore volume
• CPC Class Codes: C01P 2006/19 Oil-absorption capacity, e.g. DBP values
• CPC Class Codes: C09C 1/46 Graphite C09C1/0015 takes precedence
• CPC Class Codes: C09C 1/56 Treatment of carbon black ; Purification
• CPC Class Codes: C09D 11/037 characterised by the pigment
• CPC Class Codes: C09D 11/324 containing carbon black
• CPC Class Codes: D01F 11/14 with organic compounds, e.g. macromolecular compounds

Abstract

There is disclosed an aqueous ink jet ink composition comprising an aqueous vehicle and a modified carbon product containing carbon having attached at least one organic group. The organic group comprises a) at least one aromatic group and b) at least one ionic group, at least one ionizable group, or a mixture of an ionic group and an ionizable group. The organic group having an aromatic group is directly attached to the carbon by the aromatic group. The organic group may comprise a) at least one C₁ -C₁₂ alkyl group and b) at least one ionic group, at least one ionizable group, or a mixture of an ionic group and an ionizable group. Ink jet recording methods applying an ink jet ink of the present invention are also described.

Claims

1. An aqueous ink jet ink composition comprising an aqueous vehicle and a modified carbon product comprising carbon having attached at least one organic group, the organic group comprising a) at least one aromatic group, and b) at least one ionic group, at least one ionizable group, or a mixture of an ionic group and an ionizable group, wherein the at least one aromatic group of the organic group is directly attached to the carbon.

2. The composition of claim 1 wherein the modified carbon product is present in an amount of less than or equal to 20% by weight of the ink jet ink.

3. The composition of claim 1 wherein the aqueous vehicle is water.

4. The composition of claim 1 wherein the aqueous vehicle is water and a water-miscible solvent.

5. The composition of claim 1 further comprising a humectant.

6. The composition of claim 5 wherein the humectant is at least one compound selected from the group consisting of ethylene glycol, diethylene glycol, propylene glycol, glycerine, dipropylene glycols, polyethylene glycols, polypropylene glycols, amides, ethers, carboxylic acids, esters, alcohols, organosulfides, organosulfoxides, sulfones, alcohol derivatives, carbitol, butyl carbitol, cellosolve, ether derivatives, amino alcohols, and ketones.

7. The composition of claim 1 further comprising a binder.

8. The composition of claim 1 further comprising a dye.

9. The composition of claim 1 further comprising at least two additives selected from the group consisting of humectants, binders, dyes, biocides, penerrants, and surfactants.

10. The composition of claim 1 wherein the ionic or the ionizable group is a carboxylic acid or a salt thereof.

11. The composition of claim 1 wherein the ionic or the ionizable group is a sulfonic acid or a salt thereof.

12. The composition of claim 1 wherein the organic group is a sulfophenyl group or a salt thereof.

13. The composition of claim 1 wherein the organic group is p-sulfophenyl or a salt thereof.

14. The composition of claim 1 wherein the organic group is p-C₆ H₄ SO₃ Na.

15. The composition of claim 1 wherein the organic group is a carboxyphenyl group or a salt thereof.

16. The composition of claim 1 wherein the ionic or the ionizable group is a quaternary ammonium salt.

17. The composition of claim 1 wherein the ionic or the ionizable group is a sulfonamide or a salt thereof.

18. The composition of claim 1 wherein the ionic or the ionizable group has the formula --SO₂ NHCOR or a salt thereof, where R is a C₁ -C₂₀ alkyl or a phenyl group.

19. The composition of claim 1 where the organic group has the formula p-C₆ H₄ SO₂ NH₂.

20. The composition of claim 1 wherein the carbon is carbon black, graphite, vitreous carbon, finely-divided carbon, activated charcoal, activated carbon, or mixtures thereof.

21. The composition of claim 20, wherein the carbon is carbon black.

35. The composition of claim 16, wherein said organic group is 3-C₅ H₄ N(C₂ H₅)⁺, C₆ H₄ NC₅ H₅⁺, C₆ H₄ COCH₂ N(CH₃)₃⁺, C₆ H₄ COCH₂ (NC₅ H₅)⁺, C₆ H₄ CH₂ N(CH₃)₃⁺ or 3-C₅ H₄ N(CH₃)⁺.

36. The aqueous ink jet composition of claim 1, wherein said modified carbon product has a size less than or equal to one micron.

22. An aqueous ink jet ink composition comprising an aqueous vehicle and a modified carbon product comprising carbon having attached at least one organic group, the organic group comprising a) at least one C₁ -C₁₂ alkyl group, and b) at least one ionic group, at least one ionizable group, or a mixture of an ionic group and an ionizable group, wherein the at least one alkyl group of the organic group is directly attached to the carbon.

23. The composition of claim 22 wherein the ionic or the ionizable group is an ethane sulfonic acid or a salt thereof.

24. The composition of claim 22 further comprising at least two additives selected from the group consisting of humectants, binders, dyes, biocides, penetrants, and surfactants.

25. The composition of claim 22, wherein the carbon is carbon black, graphite, finely-divided carbon, vitreous carbon, activated carbon, activated charcoal, or mixtures thereof.

26. The composition of claim 25, wherein the carbon is carbon black.

27. An ink jet recording method, comprising the step of:

applying to a recording medium ink droplets discharged from orifices of an ink jet recording head, wherein said ink comprises an aqueous vehicle and a modified carbon product comprising carbon having attached at least one organic group, the organic group comprising a) at least one aromatic group, and b) at least one ionic group, at least one ionizable group, or a mixture of an ionic group and an ionizable group, wherein the at least one aromatic group of the organic group is directly attached to the carbon.

28. The method of claim 27, wherein the ink further comprises at least two additives selected from the group consisting of humectants, binders, dyes, biocides, penerrants, and surfactants.

29. The composition of claim 27, wherein the carbon is carbon black, graphite, finely-divided carbon, vitreous carbon, activated carbon, activated charcoal, or mixtures thereof.

30. An ink jet recording method, comprising the step of:

applying to a recording medium ink droplets discharged from orifices of an ink jet recording head, wherein said ink comprises an aqueous vehicle and a modified carbon product comprising carbon having attached at least one organic group, the organic group comprising a) at least one C₁ -C₁₂ alkyl group, and b) at least one ionic group, at least one ionizable group, or a mixture of an ionic group and an ionizable group, wherein the at least one alkyl group of the organic group is directly attached to the carbon.

31. The method of claim 30, wherein the ink further comprises at least two additives selected from the group consisting of humectants, binders, dyes, biocides, penetrants, and surfactants.

32. The composition of claim 30, wherein the carbon is carbon black, graphite, finely-divided carbon, vitreous carbon, activated carbon, activated charcoal, or mixtures thereof.

33. A method for increasing the optical density of an aqueous ink jet ink, comprising the step of:

incorporating into the aqueous ink jet ink a modified carbon product comprising carbon having attached at least one organic group, the organic group comprising a) at least one aromatic group, and b) at least one ionic group, at least one ionizable group, or a mixture of an ionic group and an ionizable group, wherein the at least one aromatic group of the organic group is directly attached to the carbon.

34. A method for increasing the optical density of an aqueous ink jet ink, comprising the step of:

incorporating into the aqueous ink jet ink a modified carbon product comprising carbon having attached at least one organic group, the organic group comprising a) at least one C₁ -C₁₂ alkyl group, and b) at least one ionic group, at least one ionizable group, or a mixture of an ionic group and an ionizable group, wherein the at least one alkyl group of the organic group is directly attached to the carbon.