RADIATION-CURABLE INKJET INK COMPOSITION
The present invention relates to a radiation curable ink composition comprising a gellant. The present invention further relates to an ink set comprising such ink composition. The present invention further relates to a method for making such ink composition and a printing method using such ink composition.
1 . Radiation-curable inkjet ink composition comprising a gellant, wherein the gellant comprises sunflower wax and/or a fatty acid ester of beeswax.
2 . Radiation-curable inkjet ink composition according to claim 1 , wherein the gellant is present in an amount of 0.2 wt %-3.0 wt % based on the total weight of the radiation-curable inkjet ink composition.
3 . Radiation-curable inkjet ink composition according to claim 1 , wherein the ink composition comprises an acrylate having two or more acrylate functional groups.
4 . Radiation-curable inkjet ink composition according to claim 3 , wherein the ink composition further comprises a monofunctional acrylate.
5 . Radiation-curable inkjet ink composition according to claim 1 , wherein the gellant comprises a fatty acid ester of beeswax, the fatty ester of beeswax comprising a stearyl ester of beeswax and/or a behenyl ester of beeswax.
6 . Radiation-curable inkjet ink composition according to claim 5 , wherein the gellant has an ester fraction of at least 80%, based on the total amount of gellant.
7 . Ink set comprising a radiation-curable inkjet ink composition according to claim 1 .
8 . Method for preparing a radiation-curable inkjet ink composition according to claim 1 , the method comprising the steps of:
providing a radiation curable component;
providing gellant, wherein the gellant comprises sunflower wax and/or a fatty acid ester of beeswax;
mixing the radiation curable component and the gellant.
9 . Method for applying an image onto a recording medium, the method comprising the steps of:
a. jetting droplets of a radiation-curable inkjet ink composition according to claim 1 onto the recording medium;
b. curing the radiation-curable inkjet ink composition by irradiating the ink composition using UV radiation.