Patent ID: 7446134

Claim:
A fixative for ink-jet printing, said fixative for overcoating at least one ink printed on a print medium, each said ink printed from a separate printhead, said fixative comprising a two-part system and consisting essentially of (1) at least one reactive oligomer, said reactive oligomer comprising at least one epoxy-terminated oligomer, optionally in a vehicle, and (2) at least one second component comprising at least one polyol plus at least one base catalyst, optionally in a vehicle, said at least one reactive oligomer contained separately from said at least one second component, said at least one reactive oligomer reacting with said at least one second component on said print medium to form a hydrophobic polymer overcoating said printed ink, said polymer having a glass transition temperature within a range of −50° C. to +100° C. and a melting temperature within a range of 30° C. to 150° C.