Radiation curable compositions for pigmented liquids inks
The invention concerns radiation curable liquid pigmented ink composition, wherein ticyclodecyl di(meth)acrylate and/or tricyclodecyl mono(meth)acrylate are particularly good wetting agent. The compositions are used in inkjet inks, gravure inks and flexographic inks.
1 . Radiation curable liquid ink composition having a viscosity (measured at a temperature of 25° C. and at a shear rate of 500 s −1 ) of at most 1000 mPa·s, such composition containing tricyclodecyl di(meth)acrylate and/or tricyclodecyl mono(meth)acrylate and a pigment.
2 . Radiation curable liquid ink composition according to claim 1 , which comprises:
(a) 1-85% by weight of tricyclodecyl di(meth)acrylate and/or tricyclodecyl mono(meth)acrylate;
(b) 1-50% by weight of a pigment;
(c) 0-85% by weight of an acrylic and/or methacrylic derivative;
(d) 0-15% by weight of a photoinitiator;
(e) 0-15% by weight of a dispersing agent;
(f) 0-10% by weight of additives,
calculated on the total weight of the composition.
3 . Radiation curable liquid ink according to claim 1 , wherein the (meth)acrylic derivative (c) is a monomer or an oligomer, used alone or in admixture.
4 . Radiation curable liquid ink according to claim 1 used as ink jet ink.
5 . Radiation curable liquid ink according claim 1 used in flexography printing.
6 . Radiation curable liquid ink according to claim 1 used in gravure printing.
7 . Radiation curable liquid ink according to claim 1 , wherein the radiation curing is performed by one or more ultraviolet and/or electron beam sources.
8 . Polymeric composition obtained or obtainable by curing the radiation curable liquid ink composition according to claim 1.