Patent ID: 7897653
Filing Date: 2011-03-01
Classification: B41M,C09D

Abstract:
1. An ink set comprised of at least one radiation curable fluorescent ink comprising at least one curable monomer or oligomer, a curable gellant comprised of a curable polyamide-epoxy acrylate gellant and a polyamide co-gellant, optionally at least one photoinitiator, at least one curable wax, and at least one fluorescent material, wherein upon exposure to activating energy, the fluorescent material fluoresces to cause a visible change in the appearance of the ink, wherein the curable polyamide-epoxy acrylate gellant is obtained by reacting epoxy groups with an ethylenically unsaturated acid, wherein the at least one radiation curable fluorescent ink has a viscosity of less than about 50 mPa·s at a jetting temperature of about 40° C. to about 110° C., the viscosity of the at least one radiation curable fluorescent ink increasing by at least about 10 wherein the at least one curable wax is a hydroxyl-terminated polyethylene wax functionalized with a curable group selected from the group consisting of allylic ether and oxetane or the at least one curable wax is a carboxylic acid-terminated polyethylene wax functionalized with a curable group selected from the group consisting of acrylate, methacrylate, allylic ether, and oxetane.