Non-aqueous microemulsion inkjet ink

Patent metadata

Field	Value
Publication number	US-9523013-B2
Application number	US-201214443795-A
Country	US
Kind code	B2
Filing date	Nov 20, 2012
Priority date	Nov 20, 2012
Publication date	Dec 20, 2016
Grant date	Dec 20, 2016

Abstract

The present disclosure is drawn to a non-aqueous microemulsion inkjet ink comprising from 65 wt % to 95 wt % of a polar organic solvent system; from 0.1 wt % to 10 wt % of a colorant solids; from 0.2 wt % to 1 w % of a long-chained aliphatic capped perfluorinated ethoxylated polymer; and from 1 wt % to 7 wt % of a straight-chained or branched C4 to C12 non-polar solvent. The non-aqueous inkjet ink is in the form of a microemulsion with a continuous phase and a discontinuous phase, the continuous phase comprising the polar organic solvent system and the dye, and the discontinuous phase comprising the long-chained aliphatic capped perfluorinated ethoxylated polymer and the C4 to C12 non-polar solvent.

First claim

What is claimed is:

1. A non-aqueous microemulsion inkjet ink, comprising:
from 65 wt % to 95 wt % of a polar organic solvent system;
from 0.1 wt % to 10 wt % of a colorant;
from 0.2 wt % to 1 w % of a long-chained aliphatic capped perfluorinated ethoxylated polymer; and
from 1 wt % to 7 wt % of a straight-chained or branched C4 to C12 non-polar organic solvent,
wherein the non-aqueous inkjet ink is in the form of a microemulsion with a continuous phase and a discontinuous phase, the continuous phase comprising the polar organic solvent system and the colorant, and the discontinuous phase comprising the long-chained aliphatic capped perfluorinated ethoxylated polymer and the C4 to C12 non-polar solvent.

2. The non-aqueous microemulsion inkjet ink of claim 1 , wherein the polar organic solvent system comprises acetone, a C2 to C4 alcohol, or mixture thereof.

3. The non-aqueous microemulsion inkjet ink of claim 1 , wherein the polar organic solvent system is present at from 70 wt % to 85 wt %.

4. The non-aqueous microemulsion inkjet ink of claim 1 , wherein the colorant is a dye.

5. The non-aqueous microemulsion inkjet ink of claim 1 , wherein the non-polar organic solvent comprise a hexane or an octane solvent.

6. The non-aqueous microemulsion inkjet ink of claim 1 , wherein the weight ratio of non-polar solvent to long-chained aliphatic capped perfluorinated ethoxylated polymer is form 1:1 to 20:1.

7. The non-aqueous microemulsion inkjet ink of claim 1 , further comprising from 0.5 wt % to 5 wt % of a polymeric binder.

8. The non-aqueous microemulsion inkjet ink of claim 1 , wherein the polar organic solvent system comprises a C2 to C4 alcohol and is devoid of ketones.

9. The non-aqueous microemulsion inkjet ink of claim 8 , wherein the C2 to C4 alcohol is substantially devoid of branched alcohols.

10. The non-aqueous microemulsion inkjet ink of claim 1 , wherein the long-chained aliphatic capped perfluorinated ethoxylated polymer has the following structure:

where x is from 1 to 16 and y is from 1 to 27.

11. The non-aqueous microemulsion inkjet ink of claim 10 , wherein both of the C14 to C22 alkyl chains are C18 (stearyl).

12. A method of preparing a non-aqueous microemulsion inkjet ink, comprising:
dissolving a long-chained aliphatic capped perfluorinated ethoxylated polymer in a straight-chained or branched C4 to C12 non-polar organic solvent to form an essentially non-polar phase; and
combining the non-polar phase with a polar phase comprising a polar organic solvent system and a colorant to form a microemulsion.

13. The method of claim 12 , wherein the colorant is a dye.

14. The method of claim 12 , wherein the polar phase is combined with the non-polar phase by first admixing the polar phase with the non-polar phase, and then adding the colorant to the microemulsion.

15. The method of claim 12 , wherein the weight ratio of non-polar solvent to long-chained aliphatic capped perfluorinated ethoxylated polymer is form 1:1 to 20:1.

Assignees

• Hewlett Packard Development Co Lp

Inventors

• Reboa Jr Paul Felice

Classifications

• C09D11/102

  containing macromolecular compounds obtained by reactions other than those only involving unsaturated carbon-to-carbon bonds · CPC title

• C09D11/023

  Emulsion inks · CPC title

• C09D11/328

  characterised by dyes · CPC title

• C09D11/36 Primary

  based on non-aqueous solvents · CPC title