Gellant compositions with aromatic end-caps and oligomeric molecular weight distributions
View Patent ↗Disclosed herein are amide gellant compositions with aromatic end-caps consisting of a blend of oligomers (dimer, trimer, tetramer and pentamer) that may be optimized to stable gelling viscosity and controlled showthrough of printed inks.
1. A curable solid ink comprising a curable wax; one or more monomers; a gellant oligomer mixture composition, a photoinitiator, and an optional colorant, wherein gellant oligomer mixture composition comprises a blend of oligomers of an ester-terminated polyamide gellant of the formula:
wherein n is 1 to 12, and wherein R 1 and R 1 ′ each, independently of the other, are aromatic groups selected from the group consisting of:
wherein the blend of a oligomers is selected from two or more of the group consisting of a unimer, a dimer, a trimer, a tetramer, a pentamer, a hexamer, a heptamer, a octamer, a nonamer, a decamer, a undecamer, and a dodecamer and further wherein the gellant oligomer mixture composition is present in the curable solid ink in an amount of from about 1 to about 30% by weight of the total weight of the curable solid ink.
2. The curable solid ink of claim 1 , wherein the gellant oligomer mixture composition comprises a blend of oligomers made up of three or more, in any combination or mixture, of the oligomers selected from the group consisting of: a unimer, a dimer, a trimer, a tetramer, a pentamer, a hexamer, a heptamer, a octamer, a nonamer, a decamer, a undecamer, and a dodecamer.
3. The curable solid ink of claim 1 , wherein the gellant oligomer mixture composition comprises a blend of oligomers made up of four or more, in any combination or mixture, of the oligomers selected from the group consisting of: a unimer, a dimer, a trimer, a tetramer, a pentamer, a hexamer, a heptamer, a octamer, a nonamer, a decamer, a undecamer, and a dodecamer.
4. The curable solid ink of claim 1 , wherein the gellant oligomer mixture composition comprises a blend of oligomers made up of five or more, in any combination or mixture, of the oligomers selected from the group consisting of: a unimer, a dimer, a trimer, a tetramer, a pentamer, a hexamer, a heptamer, a octamer, a nonamer, a decamer, a undecamer, and a dodecamer.
5. The curable solid ink of claim 1 , wherein the gellant oligomer mixture composition comprises from about 40 to about 60% unimer, from about 15 to about 25% dimer, from about 7.5 to about 10% trimer, and from about 5 to about 7.5% tetramer.
6. The curable solid ink of claim 1 , wherein the curable wax is present in the curable solid ink in an amount of from about 0.1 to about 30% by weight of the total weight of the curable solid ink.
7. The curable solid ink of claim 1 , wherein the one or more monomers are present in the curable solid ink in an amount of from about 50 to about 95% by weight of the total weight of the curable solid ink.
8. The curable solid ink of claim 1 , wherein the optional colorant is present in the curable solid ink in an amount of from about 0.1 to about 10% by weight of the total weight of the curable solid ink.
9. The curable solid ink of claim 1 , wherein the photoinitiator is present in the curable solid ink in an amount of from about 0.5 to about 15% by weight of the total weight of the curable solid ink.
10. A method of jet printing an image, comprising:
jetting a curable solid ink onto a print substrate to form an image; and exposing the image to radiation to cure the curable solid ink on to the print substrate,
wherein the curable solid ink comprises a curable wax; one or more monomers; a gellant oligomer mixture composition, a photoinitiator, and an optional colorant, wherein gellant oligomer mixture composition comprises a blend of oligomers of an ester-terminated polyamide gellant of the formula:
wherein n is 1 to 12, and wherein R 1 and R 1 ′ each, independently of the other, are aromatic groups selected from the group consisting of:
wherein the blend of a oligomers is consisting of a unimer, a dimer, a trimer, a tetramer, a pentamer, and a hexamer and further wherein the gellant oligomer mixture composition is present in the curable solid ink in an amount of from about 1 to about 30% by weight of the total weight of the curable solid ink.
11. The method of claim 10 , wherein the blend of oligomers is made up of three or more, in any combination or mixture, of the oligomers selected from the group consisting of: a unimer, a dimer, a trimer, a tetramer, a pentamer, a hexamer, a heptamer, a octamer, a nonamer, a decamer, a undecamer, and a dodecamer.
12. The method of claim 10 , wherein the blend of oligomers is made up of four or more, in any combination or mixture, of the oligomers selected from the group consisting of: a unimer, a dimer, a trimer, a tetramer, a pentamer, a hexamer, a heptamer, a octamer, a nonamer, a decamer, a undecamer, and a dodecamer.
13. The method of claim 10 , wherein the blend of oligomers is made up of five or more, in any combination or mixture, of the oligomers selected from the group consisting of: a unimer, a dimer, a trimer, a tetramer, a pentamer, a hexamer. a heptamer, a octamer, a nonamer, a decamer, a undecamer, and a dodecamer.
14. The method of claim 10 , wherein the gellant oligomer mixture composition comprises from about 40 to about 60% unimer, from about 15 to about 25% dimer, from about 7.5 to about 10% trimer, and from about 5 to about 7.5% tetramer.