Patent ID: 8602523
Filing Date: 2013-12-10
Classification: B41J

Abstract:
1. An ink jet printhead comprising a plurality of channels, wherein the channels are capable of being filled with ink from an ink supply and wherein the channels terminate in nozzles on one surface of the printhead, the surface being coated with a coating composition comprising a fluorinated poly(amide-imide) copolymer, wherein the fluorinated poly(amide-imide) copolymer is a poly(amide-imide)/fluorinated polyether copolymer of the formula or mixtures thereof; wherein: (i) R (ii) R (iii) R (iv) “fluorinated ether” represents one or more partially fluorinated or fully fluorinated ether monomers; (v) x is a positive integer representing the number of repeat poly(amide-imide) units; and (vi) y is a positive integer representing the number of repeat fluorinated ether units.