Ink composition and pre-treatment fixing fluid

Patent metadata

Field	Value
Publication number	US-2017145238-A1
Application number	US-201415322938-A
Country	US
Kind code	A1
Filing date	Jul 30, 2014
Priority date	Jul 30, 2014
Publication date	May 25, 2017
Grant date	—

Abstract

An example of an ink composition includes a pigment, an anionic polymeric dispersant, polyurethane, a co-solvent, a surfactant, tristyrylphenol ethoxylate, and a balance of water. The tristyrylphenol ethoxylate is present in an amount ranging from about 0.1 wt % to about 2 wt % of a total wt % of the ink composition.

First claim

What is claimed is:

1 . An ink composition, comprising:
a pigment; an anionic polymeric dispersant; a co-solvent; a surfactant; tristyrylphenol ethoxylate present in an amount ranging from about 0.1 wt % to about 2 wt % of a total wt % of the ink composition; and a balance of water.

2 . The ink composition as defined in claim 1 , excluding a latex polymer.

3 . The ink composition as defined in claim 1 wherein the ink composition further includes polyurethane.

4 . The ink composition as defined in claim 3 wherein the ink composition is an ultraviolet (UV) curable ink composition.

5 . The ink composition as defined in claim 3 wherein the polyurethane is an anionic polyurethane polymer including:
a polyisocyanate segment;
a polyol segment having a number average molecular weight ranging from about 500 to about 6,000; and
a compound including i) an ionic group or ii) a group to form an ionic group.

6 . A pre-treatment fixing fluid for an offset coated medium, comprising:
calcium propionate present in an amount ranging from greater than 4.5 wt % to 8.0 wt % based on a total wt % of the pre-treatment fixing fluid; calcium pantothenate present in an amount ranging from about 2.0 wt % to equal to or less than 15 wt % based on the total wt % of the pre-treatment fixing fluid; a co-solvent; a surfactant; tristyrylphenol ethoxylate present in an amount ranging from about 0.1 wt % to about 2 wt % of a total wt % of the ink composition; and a balance of water.

7 . The pre-treatment fixing fluid as defined in claim 6 wherein the co-solvent is tetraethylene glycol.

8 . The pre-treatment fixing fluid as defined in claim 6 wherein the surfactant has a hydrophilic lipophilic balance (HLB) less than 10 and is present in an amount ranging from about 0.01 wt % to about 1.0 wt % based on the total wt % of the pre-treatment fixing fluid.

9 . The pre-treatment fixing fluid as defined in claim 6 , further comprising an acid present in an amount sufficient to render a pH of the pre-treatment fixing fluid from about 4.0 to about 7.0.

10 . The pre-treatment fixing fluid as defined in claim 6 , excluding a latex polymer.

11 . A method for improving print quality of an image formed on a coated offset medium, the method comprising any of:
i) printing an ink composition directly on a surface of the coated offset medium, the ink composition including:
a pigment;
an anionic polymeric dispersant;
a co-solvent;
a surfactant;
tristyrylphenol ethoxylate present in an amount ranging from about 0.1 wt % to about 2 wt % of a total wt % of the ink composition; and
a balance of water; or
ii) printing a pre-treatment fixing fluid directly onto a surface of the coated offset medium, the pre-treatment fixing fluid including:
calcium propionate present in an amount ranging from greater than 4.5 wt % to 8.0 wt % based on a total wt % of the pre-treatment fixing fluid;
calcium pantothenate present in an amount ranging from about 2.0 wt % to equal to or less than 15 wt % based on the total wt % of the pre-treatment fixing fluid;
a co-solvent;
a surfactant;
tristyrylphenol ethoxylate present in an amount ranging from about 0.1 wt % to about 2 wt % of a total wt % of the ink composition; and
a balance of water; and
then printing an ink composition on the pre-treatment fixing fluid.

12 . The method as defined in claim 11 wherein the method includes ii), and wherein the ink composition that is printed on the pre-treatment fixing fluid includes:
a pigment;
an anionic polymeric dispersant;
a co-solvent;
a surfactant;
tristyrylphenol ethoxylate present in an amount ranging from about 0.1 wt % to about 2 wt % of a total wt % of the ink composition; and
a balance of water.

13 . The method as defined in claim 12 wherein the ink composition further includes polyurethane, and wherein the method further comprises curing the printed ink composition.

14 . The method as defined in claim 11 wherein the method includes i), wherein the ink composition further includes polyurethane, and wherein the method further comprises curing the printed ink composition.

15 . The method as defined in claim 11 wherein the method includes ii) and wherein the method further comprises performing a drying operation after the pre-treatment fixing fluid and the ink composition are printed on the coated offset medium, and wherein no drying operation is performed between the printing of the pre-treatment fixing fluid and the printing of the ink composition.

Assignees

• Hewlett Packard Development Co Lp

Inventors

• Parazak Dennis P
• Lane Gregg A
• Khorrami Fereshteh
• Guo Dennis Z
• Abelovski Benjamin

Classifications

• C09D11/322

  Pigment inks · CPC title

• C09D11/38

  characterised by non-macromolecular additives other than solvents, pigments or dyes · CPC title

• B41J2/01

  Ink jet · CPC title

• C09D11/54 Primary

  Inks based on two liquids, one liquid being the ink, the other liquid being a reaction solution, a fixer or a treatment solution for the ink · CPC title

• C09D11/102

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