Radiation-curable ink and coating compositions containing ionic dye compounds as initiators
AssigneeThe Mead Corporation
InventorsPaul C. Adair, Michael J. Moore
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Abstract
The present invention provides radiation-curable ink compositions comprising pigment and a photohardenable composition; the photohardenable composition comprises a free radical addition polymerizable or crosslinkable compound and an ionic dye-reactive counter ion compound which is capable of absorbing actinic radiation and producing free radicals which initiate free radical polymerization or crosslinking of the polymerizable or crosslinkable compound.
Claims20
A radiation-curable composition comprising a colorant, a free radical addition polymerizable or crosslinkable compound, and an ionic dye-reactive counter ion compound, said ionic dye-reactive counter ion compound being capable of absorbing actinic radiation and producing free radicals which initiate free radical polymerization or crosslinking of said polymerizable or crosslinkable compound.
A method of coating or printing comprising the steps of:
- coating or printing on a substrate with a radiation-curable ink composition comprising a colorant, a free radical addition polymerizable or crosslinkable compound, and an ionic dye-reactive counter ion compound, said ionic dye-reactive counter ion compound being capable of absorbing actinic radiation and producing free radicals which initiate free radical polymerization or crosslinking of said polymerizable or crosslinkable compound;
- and
- exposing said coated or printed substrate to actinic radiation.
Dependencies are inferred from the claim text.