Printable coating

摘要

A primer-less coating composition for facestock comprises: a binder being a water-dispersible polymer; an ethylenically unsaturated compound which is aqueous-dispersible and miscible with or bonded to said water-dispersible polymer, wherein said ethylenically unsaturated compound is able to form a covalent bond with an ink; and a crosslinker, wherein said crosslinker is suitable for binding the coating to the facestock. The coating composition may be applied to a substrate to form a printable film. A printed film in accordance with the invention may be used in a label, for example for use on a container such as a bottle.

主权项

1. A printable film comprising:
a substrate; and an ink-receptive first surface layer formed from a crosslinkable coating composition comprising:
a first component comprising a binder, said binder being a water-dispersible urethane polymer, wherein said water-dispersible urethane polymer has less than 10 weight % of reactive functional groups;a second component comprising an ethylenically unsaturated compound which is aqueous-dispersible and miscible with said water dispersible polymer, wherein said ethylenically unsaturated compound comprises one or more urethane linkages and is able to form a covalent bond with an ink, wherein the ethylenically unsaturated compound is not provided as part of the water-dispersible urethane polymer, and wherein the binder in the first component is different from the ethylenically unsaturated compound in the second component; andan aziridine crosslinker which is effective to bind to both a surface of the substrate and a component of the coating composition, wherein the ink-receptive first surface layer is bound to the substrate, wherein the ethylenically unsaturated compound retains at least some of its unsaturation following binding of the ink-receptive first surface layer to the substrate and wherein the printable film comprises no primer layer.