Ink-jet inks including self cross-linkable latex particles

• US 8,894,194 B2
• Filed: 06/26/2009
• Issued: 11/25/2014
• Est. Priority Date: 06/26/2009
• Status: Active Grant

• Current Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Original Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Inventors: Ganapathiappan, Sivapackia, Tom, Howard S., Ng, Hou T.
• Primary Examiner(s): MARTIN, LAURA E
• Application Number:
  US13/379,960
• Publication Number:
  US 20120092412A1
• Time in Patent Office: 1,978 Days
• Field of Search: 347/100
• US Class Current: 347/100
• CPC Class Codes: C08F 212/08 Styrene
• CPC Class Codes: C08F 220/06 Acrylic acid; Methacrylic acid; Metal salts or ammonium salts thereof
• CPC Class Codes: C08F 220/281 and containing only one oxygen, e.g. furfuryl (meth)acrylate or 2-methoxyethyl (meth)acrylate
• CPC Class Codes: C09D 11/30 Inkjet printing inks

Abstract

The present disclosure includes compositions, methods, and systems including an ink-jet ink comprising a liquid vehicle, a colorant dispersed or dissolved in a liquid vehicle, and self cross-linkable latex particles dispersed in the liquid vehicle. The self cross-linkable latex particle can have at least 0.1 wt % of the self cross-linkable monomer on the surface of the self cross-linkable latex particle providing cross-linking sites on the surface of the self cross-linkable latex particle, and can form an intra- and inter-particle cross-linked latex polymer film after printing the ink-jet ink on a substrate and upon at least partial depletion of the liquid vehicle or a liquid vehicle component.

Claims

1. An ink-jet ink composition, comprising:

a) a liquid vehicle;

b) a colorant dispersed or dissolved in a liquid vehicle; and

c) self cross-linkable latex particles dispersed in the liquid vehicle, the self cross-linkable latex particles comprising;

i) at least one hydrophobic monomer,

ii) at least one acidic monomer, and

iii) at least one self cross-linkable monomer, the at least one self cross-linkable monomer including at least one keto group, and having the general formula;

2. The ink-jet ink composition of claim 1, wherein Y is the ring structure, and the ring structure includes at least one hetero atom having one of the following general formulas:

3. The ink jet ink composition of claim 1, wherein the self cross-linkable monomer is selected from the group consisting of tetrahydrofurfuryl methacrylate, hydroxyethyl methacrylate, and mixtures thereof.

4. The ink jet ink composition of claim 1, wherein the self cross-linkable latex particles are present in the ink composition in an amount ranging from about 0.5 wt % to about 40 wt % and have a T_g ranging from about −

40°

C to about 125°

C.

5. The ink jet ink composition of claim 1, wherein the at least one hydrophobic monomer is up to 98 wt % of the monomers and is selected from the group consisting of methyl methacrylate, ethyl methacrylate, propyl methacrylate, butyl methacrylate, hexyl methacrylate, 2-ethylhexyl methacrylate, lauryl methacrylate, octadecyl methacrylate, isobornyl methacrylate, vinyl acetate, methyl acrylate, ethyl acrylate, propyl acrylate, butyl acrylate, hexyl acrylate, 2-ethylhexyl acrylate, lauryl acrylate, octadecyl acrylate, isobornyl acrylate, styrene, and mixtures thereof;

wherein the at least one acidic monomer is from about 0.1 wt % to about 30 wt % of the monomers and is selected from the group consisting of acrylic acid, methacrylic acid, itaconic acid, maleic acid, vinyl benzoic acid, derivatives thereof, and mixtures thereof; and

wherein the at least one self cross-linkable monomer is from about 0.1 wt % to about 25 wt % of the monomers and is selected from the group consisting of tetrahydrofurfuryl methacrylate, hydroxyethyl methacrylate, and mixtures thereof.

6. The ink-jet ink composition of claim 1, wherein the self cross-linkable latex particles are present in the ink composition from about 3 wt% to about 6 wt % and the T_g of the self cross-linkable latex particles ranges from about 15°

C. to about 45°

C.

7. The ink jet ink composition of claim 1, wherein the at least partial depletion is caused by evaporation of the liquid vehicle or a liquid vehicle component at ambient conditions or by heating of the liquid vehicle or a liquid vehicle component.

8. A method of forming an ink jet ink print, comprising:

printing the ink-jet ink composition of claim 1 on a substrate; and

forming an intra- and inter-particle cross-linked latex polymer film upon at least partial depletion of the liquid vehicle or a liquid vehicle component from the ink-jet ink composition printed on the substrate.

9. The method of claim 8, wherein the ink jet ink print exhibits increased durability relative to a comparative ink-jet print which does not include intra- and inter-particle cross-linked latex polymer film.

10. The method of claim 9, wherein the increased durability includes an improvement in each of highlighter smearfastness, rub resistance, wet smudgefastness, and solvent resistance.

11. The method of claim 8, wherein the self cross-linkable latex particles are present in the ink composition from about 0.5 wt % to about 40 wt % and wherein the self cross-linkable monomer is selected from the group consisting of tetrahydrofurfuryl methacrylate, hydroxyethyl methacrylate, and mixtures thereof.

12. The method of claim 8, wherein the partial depletion is caused by evaporation of the liquid vehicle or a liquid vehicle component at ambient conditions or by heating of the liquid vehicle or a liquid vehicle component.

13. An ink-jet printing system, comprising:

a) a substrate;

b) the ink-jet ink composition of claim 1; and

c) an ink-jet printer including a reservoir containing the ink-jet ink composition and an ink-jet printhead configured to eject the ink-jet ink composition onto the substrate;

wherein the ink-jet ink composition is formulated to form an intra- and inter-particle cross-linked latex polymer film after printing the ink jet ink composition on the substrate and upon at least partial depletion of the liquid vehicle or a liquid vehicle component.

14. The ink jet printing system of claim 13, wherein the self cross-linkable latex particles are present in the ink composition from about 3 wt % to about 6 wt % and the T_g of the self cross-linkable latex particles ranges from about 15°

C. to about 45°

C.

15. The ink-jet printing system of claim 13, wherein the self cross-linkable monomer is selected from the group consisting of tetrahydrofurfuryl methacrylate, hydroxyethyl methacrylate, and mixtures thereof.

16. The ink-jet ink composition of claim 1, wherein the self cross-linkable latex particle has about 3 wt % to about 7 wt % of the self cross-linkable monomer at the surface of the self cross-linkable latex particle.

17. The ink-jet ink composition of claim 1, wherein the liquid vehicle comprises water and an organic co-solvent having a boiling point of less than 100°

C.