Curable phase change ink containing alkoxysilane monomer
A phase change ink includes an ink vehicle that includes at least one curable carrier, at least one gellant, at least one wax and at least one alkoxysilane monomer. In a method of forming an image with the ink, the phase change ink is melted, then jetted onto an image receiving substrate, wherein the phase change ink forms a gel state, and exposed to ultraviolet light to cure the curable components of the phase change ink. The alkoxysilane participates in crosslinking to form silicon-oxygen-silicon bonds, thereby producing an ink with advantageous stability and high image quality.
1. A phase change ink comprising an ink vehicle that includes at least one curable monomer or oligomer, at least one wax, at least one gellant and at least one alkoxysilane monomer.
2. The phase change ink according to claim 1 , wherein the at least one alkoxysilane monomer is of the formula:
wherein R 1 , R 2 and R 3 are each independently an alkyl group and R 4 is a hydrogen or a methyl group.
3. The phase change ink according to claim 2 , wherein R 1 , R 2 and R 3 are each independently an alkyl group containing at least 1 to about 18 carbon atoms.
4. The phase change ink according to claim 2 , wherein R 1 , R 2 and R 3 are linear alkyl groups having a same number of carbons atoms.
5. The phase change ink according to claim 1 , wherein the at least one alkoxysilane monomer is selected from the group consisting of methacryloxypropyltriethoxysilane, methacryloxypropyltrimethoxysilane, acryloxypropyltrimethoxysilane, acryloxypropyltriethoxysilane and mixtures thereof.
6. The phase change ink according to claim 1 , wherein the phase change ink is further comprised of at least one of the following additives selected from the group consisting of a reactive diluent, a initiating agent, an antioxidant, a crosslinking agent, a defoamer, a slip and leveling agent, a pigment dispersant and the like.
7. The phase change ink according to claim 1 , wherein an amount of alkoxysilane monomer is from about 10 percent weight of the ink to about 80 percent weight of the ink.
8. The phase change ink according to claim 1 , further comprising a colorant.
9. The phase change ink according to claim 1 , wherein the phase change ink has a melt viscosity of about 1 to about 35 centipoise at a jetting temperature of from about 40° C. to about 125° C.
10. A phase change ink comprising an ink vehicle that comprises at least one curable monomer or oligomer from about 10% to about 80% by weight of the ink, at least one gellant present in an amount from about 1% to about 50% by weight of ink, at least one wax present in an amount from about 0.1% to about 30% by weight of the ink and at least one alkoxysilane monomer present in an amount from about 10% to about 80% by weight of the ink.
11. The phase change ink according to claim 10 , wherein the at least one alkoxysilane monomer of the formula:
wherein R 1 , R 2 and R 3 are each independently an alkyl group and R 4 is a hydrogen or a methyl group.
12. The phase change ink according to claim 11 , wherein R 1 , R 2 and R 3 are each independently an alkyl group containing at least 1 to about 18 carbon atoms.
13. The phase change ink according to claim 11 , wherein R 1 , R 2 and R 3 are each independently an alkyl group containing at least 1 to about 4 carbon atoms.
14. The phase change ink according to claim 10 , further comprising a photoinitiator.
15. The phase change ink according to claim 10 , further comprising a colorant in an amount from about 0.5% to about 35% by weight of the ink.
16. The method of forming an image, comprising:
melting a phase change ink comprising an ink vehicle that includes at least curable monomer or oligomer, at least one wax, at least one gellant and at least one alkoxysilane monomer;
jetting the phase change ink onto an image substrate; and
exposing the phase change ink on the image receiving substrate to ultraviolet light to cure the phase change ink.
17. The method of forming an image according to claim 16 , wherein the jetting temperature is from about 40° C. to about 125° C.
18. The method of forming an image according to claim 16 , wherein the exposing the phase change ink on the image receiving substrate to ultraviolet light is for an amount of time from about 0.01 seconds to about 5 seconds.
19. The method of forming an image according to claim 16 , wherein the image receiving substrate is subjected to an ambient atmosphere or alternatively an atmosphere containing about 50% to about 80% moisture for up to about 48 hours after exposing the phase change ink to ultraviolet light.
20. The method of forming an image according to claim 16 , wherein the curing of the curable components of the phase change inks continues up to about 48 hours after jetting the phase change ink to the image receiving substrate.