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.
Claims30
A coating composition for a facestock, comprising:
- a binder being a crosslinkable water-dispersible polymer comprising an ethylenically unsaturated moiety which is either provided as part of the backbone of or as a pendent sidechain of the water dispersible polymer, and wherein the coating composition is formulated so that said ethylenically unsaturated moiety is able to form a covalent bond with an ink by virtue of ethylenically unsaturated groups extant in the coating at the time the ink is applied thereto;
- and
- an aziridine crosslinker which is effective on its own to bind to both a surface of a facestock and components of the coating composition, wherein said aziridine crosslinker is the only crosslinker present in the coating composition,
- wherein said aziridine crosslinker is suitably formulated in the coating composition to be capable of binding and adhering the coating composition to the facestock, and
- wherein said aziridine crosslinker is present in the coating composition in an amount in excess of that required for stoichiometric crosslinking of the water dispersible polymer.
Dependencies are inferred from the claim text.