Sericol Limited

Fujifilm Speciality Ink Systems Limited

Jeremy Ward

Nigel P Gould

Barry Michael McGregor

Robert Augustus Fassam

Carole Noutary

Matthew Kite

Sarah Canning

Lee Corfe

Nigel Gould

Barry Mcgregor

Lee Sexton

Robert Fassam

The present invention provides an inkjet ink comprising: 5-40% by weight of an N-vinyl monomer selected from N-vinyl caprolactam, N-vinyl pyrrolidone, N-vinyl piperidone, N-vinyl carbazole, N-vinyl formamide, N-vinyl indole, N-vinyl imidazole, N-vinyl acetamide, and mixtures thereof, based on the total weight of the ink; one or more difunctional monomers in which the only radiation-curable functional groups present in the monomer are (meth)acrylate groups; 9% or less by weight of a monofunctional monomer, other than the N-vinyl monomer, together with a multifunctional monomer, based on the total weight of the ink; a radical photoinitiator; and a colouring agent. The present invention also provides a method of inkjet printing using the inkjet ink of the present invention and use of an N-vinyl monomer selected from N-vinyl caprolactam, N-vinyl pyrrolidone, N-vinyl piperidone, N-vinyl carbazole, N-vinyl formamide, N-vinyl indole, N-vinyl imidazole, N-vinyl acetamide, and mixtures thereof to increase the cure speed of an inkjet ink comprising one or more of difunctional monomers.

Inkjet ink

The present invention provides a method of inkjet printing, comprising: (i) inkjet printing an inkjet ink on to a substrate, wherein the ink comprises: an N-vinyl monomer selected from N-vinyl caprolactam, N-vinyl pyrrolidone, N-vinyl piperidone, N-vinyl carbazole, N-vinyl formamide, N-vinyl indole, N-vinyl imidazole, N-vinyl acetamide, and mixtures thereof; one or more difunctional monomers; and a radical photoinitiator; and (ii) curing the ink by exposing the printed ink to a UV radiation source, wherein the UV radiation source moves relative to the substrate at a speed of 70 m/min or more.

Method of inkjet printing

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&#xb0; C., a radiation-curable material, and a photoinitiator; and exposing the inkjet ink to UV LED light to cure the inkjet ink.

Method of printing

The present invention provides an inkjet ink comprising: 6-35% by weight of NVC; 5-60% by weight of PEA; 15-35% by weight of a C8.12 alkane diol di(meth)acrylate; a radical photoinitiator; and a colorant, wherein the percentages by weight are based on the total weight of the ink. The present invention further provides an inkjet ink set wherein at least one of the inks in the set, preferably all of the inks in the set, is an inkjet ink as defined above. Furthermore, the present invention provides a method of inkjet printing comprising inkjet printing the inkjet ink or inkjet ink set as defined above onto a substrate and curing the ink.

Printing ink

The invention relates to an inkjet ink comprising: one or more monofunctional (meth)acrylate monomers, including 2-methyl-2-ethyl-1,3-dioxolane-4-yl)methyl acrylate (MEDA); a pigment; and a photoinitiator.

The present invention provides a method of inkjet printing comprising the following steps, in order: (i) providing a hybrid inkjet ink comprising an organic solvent, a radiation-curable material, a photoinitiator and optionally a colorant; (ii) printing the ink on to a substrate; (iii) pinning the ink by exposing the ink to actinic radiation at a dose of 1-200 mJ/cm; (iv) evaporating at least a portion of the solvent from the ink; and (v) exposing the ink to additional actinic radiation to cure the ink.

Ink-jet printing method

The present invention provides an inkjet ink including at least 50% by weight of organic solvent based on the total weight of the ink, a radiation curable material, a photoinitiator and a colorant. The invention also provides an apparatus for printing the ink wherein the apparatus includes at least one printhead, a means for evaporating solvent from the printed ink and a source of actinic radiation. Furthermore, the invention provides a method of inkjet printing including i) inkjet printing the inkjet ink as defined above on to a substrate; ii) evaporating at least a portion of the solvent from the printed ink; and iii) exposing the printed ink to actinic radiation to cure the radiation curable material.

Printing ink, apparatus and method

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.

The present invention provides an inkjet ink comprising at least 30% by weight of organic solvent based on the total weight of the ink, a radiation curable material, a photoinitiator and optionally a colorant. The invention also provides an apparatus for printing the ink wherein the apparatus comprises at least one printhead, a means for evaporating solvent from the printed ink and a source of actinic radiation. Furthermore, the invention provides a method of inkjet printing comprising i) inkjet printing the inkjet ink as defined above on to a substrate; ii) evaporating at least a portion of the solvent from the printed ink; and iii) exposing the printed ink to actinic radiation to cure the radiation curable material.

This invention relates to an ink-jet ink comprising at least one monofunctional (meth)acrylate monomer; at least one monofunctional N-vinyl amide monomer; at least one radical photoinitiator; and at least one coloring agent. The ink has a viscosity of less than 100 mPas at 250&#xb0; C., and the ink contains no more than 15 wt % of multifunctional monomers based on the total weight of the ink.

This invention relates to an ink-jet ink substantially free of water and volatile organic solvents comprising at least one monofunctional (meth)acrylate monomer, including phenoxyethyl acrylate; at least one monofunctional N-vinyl amide monomer, including N-vinyl caprolactam; at least one radical photoinitiator; and at least one coloring agent. The ink has a viscosity of less than 100 mPas at 25&#xb0; C., and the molar ratio of the at least one monofunctional (meth)acrylate monomer to the at least one monofunctional N-vinyl amide monomer is from 1.0 to 6.0.

This invention relates to an ink-jet ink comprising at least one monofunctional (meth)acrylate monomer; at least one monofunctional N-vinyl amide monomer; at least one radical photoinitiator; and at least one coloring agent. The ink has a viscosity of less than 100 mPas at 25&#xb0; C., and the molar ratio of the at least one monofunctional (meth)acrylate monomer to the at least one monofunctional N-vinyl amide monomer is from 1.0 to 6.0.

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Broadstairs, United Kingdom

Jeremy Ward