Cationic ink formulations
A printing method includes jetting a curable ink including at least one of an oxetane compound, a siloxane compound, or a sulfide compound onto a substrate.
1. A method, comprising:
jetting a cationic ink onto a substrate to provide a mark, the ink comprising:
a cationic reagent;
a photoinitiating system;
a cationic polymerization inhibitor compound selected from the group consisting of a diphenyl sulfide compound, a di-alkyl sulfide compound, and a combination thereof; and
a colorant; and
curing the ink by exposing the mark to light.
2. The method of claim 1 , wherein the cationic reagent comprises an epoxide compound.
3. The method of claim 2 , wherein the cationic reagent comprises at least one of a siloxane epoxide compound, a cylcoaliphatic epoxide compound, or a glycidyl ether epoxide compound.
4. The method of claim 2 , wherein the epoxide compound has multiple epoxy rings.
5. The method of claim 2 , wherein the ink comprises at least about 20% by weight of oxetane compound and at least about 20% by weight of the epoxide compound.
6. The method of claim 1 , wherein the cationic reagent comprises an oxetane compound.
7. The method of claim 6 , wherein the oxetane compound comprises at least two oxetane groups.
8. A method comprising jetting an ink comprising a cationic reagent, and a cationic polymerization inhibitor compound selected from the group consisting of a diphenyl sulfide compound, a di-alkyl sulfide compound, and a combination thereof onto a substrate.
9. An ink composition, comprising:
a cationic reagent;
a photoinitiating system;
a cationic polymerization inhibitor compound selected from the group consisting of a diphenyl sulfide compound, a di-alkyl sulfide compound, and a combination thereof; and
a colorant.
10. The composition of claim 9 , wherein the composition has a viscosity of less than about 50 centipoises.
11. An inkjet printer nozzle comprising the composition of claim 9 .
12. The composition of claim 9 , wherein the composition has a viscosity determined at a temperature of 68° C. that increases by about 10% or less after storage of the composition in the dark for 7 days.
13. The composition of claim 9 , wherein the cationic reagent comprises an oxetane compound.
14. The composition of claim 13 , wherein the oxetane compound comprises at least two oxetane groups.
15. An inkjet printer cartridge, comprising:
a reservoir comprising a composition comprising:
a cationic reagent;
a photoinitiating system;
a cationic polymerization inhibitor compound selected from the group consisting of a diphenyl sulfide compound, a di-alkyl sulfide compound, and a combination thereof; and
a colorant.
16. An ink composition, comprising:
a cationic reagent;
a photoinitiating system;
a sulfide polymerization inhibitor compound selected from the group consisting of a diphenyl sulfide compound, a dodecyl sulfide compound, and a combination thereof; and
a colorant.