An ink used preferably in jet ink devices includes an ink vehicle, the ink vehicle being made up either (a) a first component curable by a first polymerization route and an associated photointiator, and a second component curable by a second polymerization route and as associated photoinitiator, whe
An ink used preferably in jet ink devices includes an ink vehicle, the ink vehicle being made up either (a) a first component curable by a first polymerization route and an associated photointiator, and a second component curable by a second polymerization route and as associated photoinitiator, wherein the second polymerization route is different from the first polymerization route, or (b) a component curable by a single polymerization route with a first and a second photoinitiator system in which the first system responds to longer wavelengths. An image may be formed by such inks by jetting onto a transfer member surface, curing the first component or partially curing the single component while upon the transfer member surface, transferring the ink to an image receiving surface, and completing curing. The first component is preferably curable via cationic polymerization and the second component is preferably curable via free radical polymerization.
대표청구항▼
What is claimed is: 1. An ink comprising an ink vehicle, wherein the ink vehicle comprises at least one curable component, and at least two photoinitiator systems, wherein the at least one curable component comprises a first component curable by a first polymerization route and a second component c
What is claimed is: 1. An ink comprising an ink vehicle, wherein the ink vehicle comprises at least one curable component, and at least two photoinitiator systems, wherein the at least one curable component comprises a first component curable by a first polymerization route and a second component curable by a second polymerization route, wherein the second polymerization route is different from the first polymerization route and the at least two photoinitiator systems include a first photoinitiator system for the first component and a second photoinitiator system for the second component, wherein the first component is at least one cationically curable material or at least one radically curable material, wherein when the first component is at least one cationically curable material and the first photoinitiator system responds to wavelengths of from 390 nm to about 500 nm or higher, the second component is at least one radically curable material and the second photoinitiator system responds to wavelengths of from about 280 nm to less than 390 nm, and wherein when the first component is at least one radically curable material and the first photoinitiator system responds to wavelengths of from about 350 nm to about 500 nm or higher, the second component is at least one cationically curable material and the second photoinitiator system responds to wavelengths of from about 200 nm to about 320 nm or less. 2. The ink according to claim 1, wherein the ink further includes at least one colorant. 3. The ink according to claim 1, wherein the first component comprises at least one cationically curable material. 4. The ink according to claim 3, wherein the at least one cationically curable material comprises an epoxide, a vinyl ether or a styrenic group. 5. The ink according to claim 1, wherein the first component comprises from about 5% to about 80% by weight of the ink vehicle. 6. The ink according to claim 1, wherein the second component comprises at least one radically curable material. 7. The ink according to claim 6, wherein the at least one radically curable material comprises an acrylate. 8. The ink according to claim 7, wherein the acrylate is selected from the group consisting of propoxylated neopentyl glycol diacrylate, hexanediol diacrylate, tripropylene glycol diacrylate, dipropylene glycol diacrylate, amine modified polyether acrylates, trimethylolpropane triacrylate, dipentaerythritol penta-/hexa-acrylate, ethoxylated pentaerythritol tetraacrylate, tridecyl acrylate, 2-phenoxyethyl acrylate, 4-t-butylcyclohexyl acrylate, and mixtures thereof. 9. The ink according to claim 6, wherein the second photoinitiator system for curing of the at least one radically curable material is selected from the group consisting of 1-hydroxy-cyclohexylphenylketone, benzophenone, 2,4,6-trimethylbenzophenone, 4-methylbenzophenone, 2-benzyl 2-dimethylamino 1-(4-morpholinophenyl) butanone-1, 2-methyl-1-(4-methylthio)phenyl-2-(4-morphorlinyl)-1-propanone, diphenyl-(2,4,6-trimethylbenzoyl) phosphine oxide, phenyl bis(2,4,6-trimethylbenzoyl) phosphine oxide, 2,4,6-trimethylbenzoylphenylphosphinic acid ethyl ester, oligo(2-hydroxy-2-methy-1-(4-(1-methylvinyl)phenyl) propanone), 2-hydroxy-2-methyl-1-phenyl-1-propanone, benzyl-dimethylketal, isopropylthioxanthone, and mixtures thereof. 10. The ink according to claim 1, wherein the ink has a viscosity of between about 10 and about 15 cP at temperatures of from about 30 to about 50° C. 11. The ink according to claim 1, wherein the ink further includes an amine synergist.
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