Waterbased UV inkjet ink containing synthetic thickener
AssigneeSun Chemical Corporation
InventorsShaun Lawrence Herlihy, Sean Phillip Francis Mayers
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Abstract
The invention describes the use of a water-based energy curable inkjet ink or coating composition comprising one or more synthetic rheology modifiers, one or more energy curable resins, one or more tertiary amines, and water. The viscosity of the water-based energy curable inkjet ink or coating compositions is fine tuned to the requirements of the print head through the use of a synthetic thickener. The extremely low levels required of this type of material are particularly advantageous because they then have little if any impact on the physical properties of the dried and UV cured ink. Surprisingly, the use of s synthetic thickener at these low levels gives Newtonian character inks.
Claims15
A water-based energy curable inkjet ink or coating composition comprising:
- a) 0.1 wt % to 3 wt % one or more synthetic rheology modifiers;
- b) 15 wt % to 45 wt % one or more energy curable resins;
- c) 0.1 wt % to 4 wt % one or more tertiary amines;
- and
- d) 20 wt % to 80 wt % water;
- wherein the water-based energy curable inkjet ink or coating composition has a pH of 7.0 to 9.5;
- and
- wherein the ink or coating composition exhibits Newtonian characteristics.
A method of preparing a water-based energy curable inkjet ink or coating composition, comprising the steps of:
- a) mixing 0.1 wt % to 3 wt % one or more synthetic rheology modifiers, 15 wt % to 45 wt % one or more energy curable resins, 0.1 wt % to 4 wt % one or more tertiary amines, and 20 wt % to 80 wt % water;
- and
- b) adjusting the pH to 7.0 to 9.5;
- wherein the ink or coating composition exhibits Newtonian characteristics.
Dependencies are inferred from the claim text.