Patent ID: 9676962
Date: 2017-06-13
CPC Classifications: B41J,C08G,C09D

Claim:
1. An ink jet printhead configured for ejecting aqueous ink comprising: a front face having disposed on a surface thereof an anti-wetting, low adhesion coating, wherein the low adhesion coating is a reaction product of a reactant mixture comprising a perfluoropolyether diol compound comprising an ethyoxylated spacer and a triisocyanante, wherein a jetted drop of aqueous ink exhibits a low sliding angle and a high contact angle with the printhead front face surface comprising the coating, wherein the low sliding angle is less than about 30° and the contact angle is greater than about 40°, wherein the ink jet printhead comprises aqueous ink and wherein the aqueous ink comprises a surfactant, wherein the low adhesion coating maintains the average contact angle of greater than 40° with the aqueous ink after being fouled by dried aqueous ink.