Eastman-kodak Company

Yang Xiang

Raouf Botros

Thomas Joseph Dannhauser

A coating composition for pre-treating a substrate prior to inkjet printing thereon, and an inkjet receiving medium including a substrate and having a topmost layer coated thereon, where the coating composition has a solids content which includes at least 30 wt % of one or more aqueous soluble salts of multivalent metal cations, and particles had primarily of polymer having a Rockwell Hardness of less than R90 and having a mode equivalent spherical diameter of at least about 2 micrometers. When coated, the composition provides at least 0.01 g/mof particles included primarily of polymer having a Rockwell Hardness of less than R90 and which have an equivalent spherical diameter of i) at least about 2 micrometers and ii) at least 0.1 micrometer greater than the minimum coated thickness of the topmost layer.

Pre-treatment composition for inkjet printing

A coating composition for pre-treating a substrate prior to inkjet printing thereon, and an inkjet receiving medium comprising a substrate and having a topmost layer coated thereon, where the coating composition and topmost layer comprise one or more aqueous-soluble salts of multivalent metal cations, a cationic polyelectrolyte comprising amidine moieties, and one or more second polymer which is distinct from the cationic polyelectrolyte and which is selected from the group consisting of a polyamide-epichlorohydrin, a polyamine solution polymer, and a waterborne or water-dispersible polyurethane. The topmost layer is advantageously at a solid content of from 0.1 to 5 g/m, and comprises from 30-90 wt % of the one or more aqueous soluble salts of multivalent metal cations, at least 0.01 g/mof the cationic polyelectrolyte comprising amidine moieties, and at least 0.005 g/mof the second polymer which is distinct from the cationic polyelectrolyte comprising amidine moieties.

Growing community of inventors

Dayton, OH, United States of America

Yang Xiang