Patent 7442723 was granted and assigned to E.I. Du Pont De Nemours And Company on October, 2008 by the United States Patent and Trademark Office.
This invention pertains to an inkjet ink comprising a polyazetidinium groups-containing component, various ink sets comprising this ink, including one ink set with at least one co-reactive ink, and a method of printing with the ink and ink sets. When the inks are printed onto a substrate, the polyazetidinium groups can chemically react to enhance the durability of the printed image.