US Patent 8133580 Coating composition for a urinary catheter

The invention relates to an article comprising a coating, which coating comprises at least two layers, of which the inner layer is a primer layer, comprising a supporting polymer network which is composed of a supporting polymer selected from the group consisting of polyethers and polythioethers, including copolymers thereof, the supporting network optionally comprising a functional non-ionic hydrophilic polymer entangled in the supporting polymer network; and the outer layer is a functional layer comprising a functional non-ionic hydrophilic polymer and a polyelectrolyte.