Patent ID: 7439285

Claim:
A micron liquid thermosetting ink-jet ink, comprising: (a) at least one solid latent curing agent comprising an inert filler comprising barium sulfate, the inert filler being treated with a latent curing agent; said inert filler having a maximal particle size of less than 2 microns and optionally being porous; said latent curing agent being precipitated as a layer on said inert filler or being precipitated in the form of small crystals onto said inert filler surface and/or inside the internal porosity of said inert filler; and (b) one or more epoxy resins; said ink-jet ink being characterized by a viscosity lower than 50 Cps at application temperature; a surface tension lower than 80 dyn/cm at application temperature; and a glass transition temperature, in the cured form, of greater than 120° C.