An oil-based inkjet ink can be provided that prevents adhesion of the ink to the nozzle plate, thereby preventing ink misfires and discharge defects from the inkjet nozzles. The oil-based inkjet ink contains a pigment, a non-aqueous solvent, and a compound represented by general formula (1) shown below. ##STR00001##
(In general formula (1), m represents 1 or 2, each of R.sup.1 and R.sup.2 independently represents a monovalent saturated hydrocarbon group, R.sup.3 represents a single bond or a divalent saturated hydrocarbon group, and R.sup.4 represents a monovalent or divalent saturated hydrocarbon group.)

An oil-based inkjet ink can be provided that prevents adhesion of the ink to the nozzle plate, thereby preventing ink misfires and discharge defects from the inkjet nozzles. The oil-based inkjet ink contains a pigment, a non-aqueous solvent, and a compound represented by general formula (1) shown below. ##STR00001##
(In general formula (1), m represents 1 or 2, each of R.sup.1 and R.sup.2 independently represents a monovalent saturated hydrocarbon group, R.sup.3 represents a single bond or a divalent saturated hydrocarbon group, and R.sup.4 represents a monovalent or divalent saturated hydrocarbon group.)

A radiation curable ink composition that includes (A) a mono-ethylenically unsaturated oligomer, (B) a mono-ethylenically unsaturated monomer, and (C) an acrylate ester of a carboxylic acid ester and which is substantially free of a photoinitiator. A printed article including the radiation curable ink composition in cured form, and a method of forming an image with the radiation curable ink composition are also provided.

A radiation curable ink composition that includes (A) a mono-ethylenically unsaturated oligomer, (B) a mono-ethylenically unsaturated monomer, and (C) an acrylate ester of a carboxylic acid ester and which is substantially free of a photoinitiator. A printed article including the radiation curable ink composition in cured form, and a method of forming an image with the radiation curable ink composition are also provided.

The present invention relates to flexible and stretchable UV and thermally curable dielectric ink compositions that can be thermo or vacuum formed. The flexible ink can form a stretchable dielectric coating having excellent adhesion. The dielectric ink compositions can be applied on a circuit board, such as a paper-phenolic resin board, plastic board (PMMA, PET or the like) or a glass-epoxy resin board, by screen printing or the like, followed by heat/UV curing. The compositions are suitable for use in applications such as a capacitive touch, in-mold forming, creating cross over insulation layers, and manufacturing electronic circuitry and devices.

The present invention relates to flexible and stretchable UV and thermally curable dielectric ink compositions that can be thermo or vacuum formed. The flexible ink can form a stretchable dielectric coating having excellent adhesion. The dielectric ink compositions can be applied on a circuit board, such as a paper-phenolic resin board, plastic board (PMMA, PET or the like) or a glass-epoxy resin board, by screen printing or the like, followed by heat/UV curing. The compositions are suitable for use in applications such as a capacitive touch, in-mold forming, creating cross over insulation layers, and manufacturing electronic circuitry and devices.

An ink contains water, a coloring material, and a polymer having a structure unit represented by the following Chemical formula 1 and a structure unit having an anionic group, ##STR00001## where R.sub.1 represents a hydrogen atom or a methyl group, L.sub.1 is an alkylene group having three to five carbon atoms having a hydroxyl group, L.sub.2 is an alkylene group having two to ten carbon atoms, and Ar represents a phenyl group, a biphenyl group, or a naphthyl group.

An ink contains water, a coloring material, and a polymer having a structure unit represented by the following Chemical formula 1 and a structure unit having an anionic group, ##STR00001## where R.sub.1 represents a hydrogen atom or a methyl group, L.sub.1 is an alkylene group having three to five carbon atoms having a hydroxyl group, L.sub.2 is an alkylene group having two to ten carbon atoms, and Ar represents a phenyl group, a biphenyl group, or a naphthyl group.

An ink composition contains pigment particles, inorganic oxide particles, and a lactam solvent. The content of the inorganic oxide particles is 5.0% to 10.0% relative to the total mass of the ink composition. The ink composition satisfies the following relationship: D.sub.50 of the pigment particles×0.1≤D.sub.50 of the inorganic oxide particles≤D.sub.50 of the pigment particles×1.5, wherein D.sub.50 represents the volume median diameter of the corresponding particles.

An ink composition contains pigment particles, inorganic oxide particles, and a lactam solvent. The content of the inorganic oxide particles is 5.0% to 10.0% relative to the total mass of the ink composition. The ink composition satisfies the following relationship: D.sub.50 of the pigment particles×0.1≤D.sub.50 of the inorganic oxide particles≤D.sub.50 of the pigment particles×1.5, wherein D.sub.50 represents the volume median diameter of the corresponding particles.