Printable coating
AssigneeInnovia Films Limited
InventorsAlastair Hugh Servante, Simon James Read
Life of this patent
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Abstract
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.
Claims13
A coating composition for a facestock, said facestock having a substrate layer, comprising:
- a binder being a water-dispersible polymer, wherein said water-dispersible polymer is a urethane;
- an ethylenically unsaturated compound which is aqueous-dispersible and miscible with said water-dispersible polymer, wherein said ethylenically unsaturated compound is able to form a covalent bond with an ink by virtue of ethylenically unsaturated groups extant in the coating at the time an ink is applied thereto;
- and
- a crosslinker that binds to functional groups on the surface of the substrate and functional groups in the coating composition, including the ethylenically unsaturated compound, wherein said crosslinker can bind and adhere the coating composition to the facestock, wherein said crosslinker is present in an amount in excess of that required for stoichiometric crosslinking of the water-dispersible polymer, wherein said crosslinker is an aziridine crosslinker and is the only crosslinker present in said coating composition, and wherein said coating composition is capable of forming an ink-receptive surface suitable for printing.
Dependencies are inferred from the claim text.