UV curable inkjet ink compositions
A UV curable inkjet ink composition includes a monofunctional urethane acrylate component consisting of 5-50% by weight of the ink composition, the monofunctional urethane acrylate component comprising either of a monomer and an oligomer; a monomer component consisting of 10-80% by weight of ink composition; a photoinitiator component consisting of 1-15% by weight of ink composition; and an oligomer component, consisting of no more than 20% by weight of the ink composition, in addition to the monofunctional urethane acrylate component if the monofunctional urethane acrylate component is an oligomer.
1. A UV curable inkjet ink composition, comprising:
a monofunctional urethane acrylate component constituting 12-35% by weight of the UV curable inkjet ink composition, said monofunctional urethane acrylate component comprising either of a monomer and an oligomer;
an additional monomer component constituting 10-80% by weight of the UV curable inkjet ink composition, the 10-80% by weight of the additional monomer component is in addition to the 12-35% by weight of the monofunctional urethane acrylate component when the monofunctional urethane acrylate component is a monomer;
a photoinitiator component constituting 1-15% by weight of the UV curable inkjet ink composition; and
an additional oligomer component constituting more than 0% but no more than 20% by weight of the UV curable inkjet ink composition, the no more than 20% by weight of the additional oligomer component is in addition to the 12-35% by weight of the monofunctional urethane acrylate component when the monofunctional urethane acrylate component is an oligomer.
2. The UV curable inkjet ink composition of claim 1 , wherein said monofunctional urethane acrylate component is 2-[[(butylamino)carbonyl]oxy]ethyl acrylate.
3. The UV curable inkjet ink composition of claim 1 , wherein the additional monomer component is selected from the group consisting of vinyl caprolactam, isobornyl acrylate, 2-phenoxyethyl acrylate, cyclic trimethylol-propane formal acrylate, 4-tert-butylcyclohexyl acetate, and combinations of these materials.
4. The UV curable inkjet ink composition of claim 1 , wherein the additional monomer component constitutes 30-60% by weight of the UV curable inkjet ink composition.
5. The UV curable inkjet ink composition of claim 1 , wherein the additional monomer component constitutes 10-30% by weight of the UV curable inkjet ink composition.
6. The UV curable inkjet ink composition of claim 1 , further comprising:
a pigment component.
7. The UV curable inkjet ink composition of claim 6 , wherein the pigment component constitutes up to 20% by weight of the UV curable inkjet ink composition.
8. The UV curable inkjet ink composition of claim 1 , further comprising:
an additive component.
9. The UV curable inkjet ink composition of claim 8 , wherein the additive component constitutes 0.1-5% by weight of the UV curable inkjet ink composition.
10. The UV curable inkjet ink composition of claim 1 , wherein the UV curable inkjet ink composition has a jettable viscosity for inkjet printers not greater than 30 cps at 45 Celsius.
11. The UV curable inkjet ink composition of claim 1 , wherein the UV curable inkjet ink composition has a jettable viscosity for inkjet printers of 10-20 cps at 45 Celsius.
12. A method of ink jet printing comprising:
jetting from an ink jet printer an ink composition onto a substrate, the ink composition comprising:
a monofunctional urethane acrylate component constituting 12-35% by weight of the ink composition, said monofunctional urethane acrylate component comprising either of a monomer and an oligomer;
an additional monomer component constituting 10-80% by weight of the ink, the 10-80% by weight of the additional monomer component is in addition to the 12-35% by weight of the monofunctional urethane acrylate component when the monofunctional urethane acrylate component is a monomer;
a photoinitiator component constituting 1-15% by weight of the ink composition; and
an additional oligomer component constituting more than 0% but no more than 20% by weight of the ink composition, the no more than 20% by weight of the additional oligomer component is in addition to the 12-35% by weight of the monofunctional urethane acrylate component when the monofunctional urethane acrylate component is an oligomer.