Abstract: This invention provides an inkjet ink comprising: an ?,?-unsaturated ether monomer in which the only radiation-curable functional groups present in the monomer are ?,?-unsaturated ether groups; a tri- or higher functionality (meth)acrylate monomer in which the only radiation-curable functional groups present in the monomer are acrylate groups; and a colouring agent; wherein the ink contains less than 5% by weight of water and volatile organic solvents in total, and less than 10% by weight of mono- and di-functional monomers in total, other than the ?,?-unsaturated ether monomer, where the amounts by weight are based on the total weight of the ink, and wherein the ink has a viscosity of less than 100 mPas at 25° C. The ink is particularly suitable for printing onto food packaging.

Abstract: This invention provides an inkjet ink comprising: an ?,?-unsaturated ether monomer in which the only radiation-curable functional groups present in the monomer are ?,?-unsaturated ether groups; a low-viscosity difunctional (meth)acrylate monomer in which the only radiation-curable functional groups present in the monomer are acrylate groups, wherein the low-viscosity difunctional (meth)acrylate monomer has a viscosity of 0.5 to 6.5 mPas at 25° C.; and a colouring agent; wherein the ink contains less than 5% by weight of water and volatile organic solvents in total, and less than 10% by weight of mono- and difunctional monomers in total, other than the ?,?-unsaturated ether monomer and the low-viscosity difunctional (meth)acrylate monomer, where the amounts by weight are based on the total weight of the ink, and wherein the ink has a viscosity of less than 30 mPas at 25° C.

Abstract: The present invention provides a method of inkjet printing comprising: inkjet printing an inkjet ink onto a substrate, wherein the inkjet ink comprises a resin having a glass transition temperature of from 25 to 105° C., a radiation-curable material, and a photoinitiator; and exposing the inkjet ink to UV LED light to cure the inkjet ink.

Abstract: This invention provides an inkjet ink comprising: an ?,?-unsaturated ether monomer in which the only radiation-curable functional groups present in the monomer are ?,?-unsaturated ether groups; a tri- or higher functionality (meth)acrylate monomer in which the only radiation-curable functional groups present in the monomer are acrylate groups; and a colouring agent; wherein the ink contains less than 5% by weight of water and volatile organic solvents in total, and less than 10% by weight of mono-and di-functional monomers in total, other than the ?,?-unsaturated ether monomer, where the amounts by weight are based on the total weight of the ink, and wherein the ink has a viscosity of less than 100 mPas at 25° C. The ink is particularly suitable for printing onto food packaging.

Abstract: A radiation-curable ink comprising (i) a colorant; (ii) a cyclohexyl acrylate of the Formula (1) wherein each R independently is C1-4-alkyl; n has a value of 1, 2 or 3; and Q is H or CH3; (iii) a monoacrylate which comprises a cyclohexyl and/or cyclopentyl ring; and (iv) 0 to 5 wt % of N-vinyl caprolactam; and (v) cyclic trimethylolpropane formal acrylate.

Abstract: This invention provides an inkjet ink comprising: an ?,?-unsaturated ether monomer in which the only radiation-curable functional groups present in the monomer are ?,?-unsaturated ether groups; a tri- or higher functionality (meth)acrylate monomer in which the only radiation-curable functional groups present in the monomer are acrylate groups; and a colouring agent; wherein the ink contains less than 5% by weight of water and volatile organic solvents in total, and less than 10% by weight of mono- and di-functional monomers in total, other than the a,I3-unsaturated ether monomer, where the amounts by weight are based on the total weight of the ink, and wherein the ink has a viscosity of less than 100 mPas at 25° C. The ink is particularly suitable for printing onto food packaging.

Abstract: The present invention provides a method of inkjet printing comprising: inkjet printing an inkjet ink onto a substrate, wherein the inkjet ink comprises a resin having a glass transition temperature of from 25 to 105° C., a radiation-curable material, and a photoinitiator; and exposing the inkjet ink to UV LED light to cure the inkjet ink.

Abstract: A radiation-curable ink comprising (i) a colorant; (ii) a cyclohexyl acrylate of the Formula (1) wherein each R independently is C1-4-alkyl; n has a value of 1, 2 or 3; and Q is H or CH3; (iii) a monoacrylate which comprises a cyclohexyl and/or cyclopentyl ring; and (iv) 0 to 5 wt % of N-vinyl caprolactam; and (v) cyclic trimethylolpropane formal acrylate.

Abstract: This invention provides an inkjet ink comprising: an ?,?-unsaturated ether monomer in which the only radiation-curable functional groups present in the monomer are ?,?-unsaturated ether groups; a tri- or higher functionality (meth)acrylate monomer in which the only radiation-curable functional groups present in the monomer are acrylate groups; and a colouring agent; wherein the ink contains less than 5% by weight of water and volatile organic solvents in total, and less than 10% by weight of mono-and di-functional monomers in total, other than the ?,?-unsaturated ether monomer, where the amounts by weight are based on the total weight of the ink, and wherein the ink has a viscosity of less than 100 mPas at 25° C. The ink is particularly suitable for printing onto food packaging.

Abstract: The present invention provides an inkjet ink comprising 5 to 30% by weight of organic solvent based on the total weight of the ink, a radiation curable monofunctional monomer, a radiation curable multifunctional monomer, a photoinitiator and a colourant.

Abstract: A method of curing radiation-curable fluid is described. In one example, the method includes emitting radiation from an array of light-emitting diodes towards ink to be cured. LEDs are cheap, light weight, highly efficient in their conversion of electrical power, and give effectively instant switching to full power. Another advantage is that the emission spectrum of an LED is sharply peaked around the nominal frequency. Thus LEDs give several advantages over conventional radiation sources such as mercury lamps. A low oxygen environment is preferably provided at the radiation source to accelerate the curing reaction. Also described are inks which are specially formulated to respond to the radiation emission spectrum of an LED.

Abstract: The present invention provides an inkjet ink comprising 5 to 30% by weight of organic solvent based on the total weight of the ink, a radiation curable monofunctional monomer, a radiation curable multifunctional monomer, a photoinitiator and a colourant.

Abstract: A method of curing radiation-curable fluid is described. In one example, the method includes emitting radiation from an array of light-emitting diodes towards ink to be cured. LEDs are cheap, light weight, highly efficient in their conversion of electrical power, and give effectively instant switching to full power. Another advantage is that the emission spectrum of an LED is sharply peaked around the nominal frequency. Thus LEDs give several advantages over conventional radiation sources such as mercury lamps. A low oxygen environment is preferably provided at the radiation source to accelerate the curing reaction. Also described are inks which are specially formulated to respond to the radiation emission spectrum of an LED.

Abstract: A method of curing radiation-curable fluid is described. In one example, the method includes emitting radiation from an array of light-emitting diodes towards ink to be cured. LEDs are cheap, light weight, highly efficient in their conversion of electrical power, and give effectively instant switching to full power. Another advantage is that the emission spectrum of an LED is sharply peaked around the nominal frequency. Thus LEDs give several advantages over conventional radiation sources such as mercury lamps. A low oxygen environment is preferably provided at the radiation source to accelerate the curing reaction. Also described are inks which are specially formulated to respond to the radiation emission spectrum of an LED.

Abstract: This invention relates to inks for use in ink-jet printers that are cured using ultraviolet radiation. Specifically, the present invention relates to an ink-jet ink which is substantially free of water, volatile organic solvents and multifunctional (meth)acrylates comprising at least one monofunctional (meth)acrylate monomer, at least one ?,?-unsaturated ether monomer, at least one radical photoinitiator and at least one coloring agent, the ink having a viscosity of less than 50 mPas at 25° C. This provides extra-low viscosity inks, which still meet the requirements for printing onto porous substrates such as paper and board.

Abstract: This invention relates to a printing ink for use in ink-jet printing which is cured using ultraviolet radiation. The ink-jet ink has a viscosity of less than 100 mPas at 25° C. and comprises the following components: 20 to 70% by weight of at least one epoxy functional monomer, 2 to 70% by weight of at least one oxetane functional monomer, 0.5 to 40% by weight of at least one hydroxy-containing compound, 0 to 40% by weight of at least one allyl and/or vinyl ether monomer, at least one cationic photoinitiator, and at least one colouring agent, the ink. The ink jet ink formulation provides a balance of the properties of the ink, namely viscosity, flexibility and cure speed.

Abstract: This invention relates to an ink-jet printing method using a cationic ink-jet cured by low-intensity actinic radiation. The method comprises printing an ink-jet ink comprising at least one cationically polymerisable monomer, oligomer and/or prepolymer and at least one cationic photoinitiator on to a substrate using an ink-jet printer. The substrate has a surface pH of less than 7.0 and the ink is cured using low-intensity actinic radiation typically providing a dose energy at the surface of the substrate of no more than 150 mJ/cm2.

Abstract: A method of curing radiation-curable fluid is described. In one example, the method includes emitting radiation from an array of light-emitting diodes towards ink to be cured. LEDs are cheap, light weight, highly efficient in their conversion of electrical power, and give effectively instant switching to full power. Another advantage is that the emission spectrum of an LED is sharply peaked around the nominal frequency. Thus LEDs give several advantages over conventional radiation sources such as mercury lamps. A low oxygen environment is preferably provided at the radiation source to accelerate the curing reaction. Also described are inks which are specially formulated to respond to the radiation emission spectrum of an LED.

Abstract: This invention relates to a water-based W curable printing ink which may be applied by a variety of printing processes. The invention provides an ink comprising (i) water and (ii) a polymer having a plurality of 1,2- and/or 1,3-diol groups along the polymer backbone and having pendant photo cross-linkable groups attached thereto. The polymer is typically a polyvinyl alcohol and examples of the pendant photo cross-linkable groups include styryl pyridinium and acrylate groups.

Abstract: This invention relates to inks for use in ink-jet printers that are cured using ultraviolet radiation. Specifically, the present invention relates to an ink-jet ink which is substantially free of water, volatile organic solvents and multifunctional (meth)acrylates comprising at least one monofunctional (meth)acrylate monomer, at least one ?,?-unsaturated ether monomer, at least one radical photoinitiator and at least one colouring agent, the ink having a viscosity of less than 50 mPas at 25° C. This provides extra-low viscosity inks, which still meet the requirements for printing onto porous substrates such as paper and board.