Coating composition for a urinary catheter

A composition for providing an article with a primer layer comprising

• a) a supporting polymer selected from the group consisting polyethers and polythioethers, including copolymers thereof, in a total concentration of 1-60 wt %, based on the total weight of the composition
• b) a functional non-ionic hydrophilic polymer in a total concentration of 0-30 wt %, based on the total weight of the composition;
• c) a Norrish I type photoinitiator, preferably in a total concentration 1-10 wt %, based on the weight of components a) and b);
• and
• d) at least 68 wt % of a solvent, wherein the components a), b) and c) are dissolved or dispersed.

Method for preparing a coating comprising

• applying a primer composition to a surface, wherein the primer composition comprises;
• a) a supporting polymer selected from the group consisting polyethers and polythioethers, including copolymers thereof, in a total concentration of 1-60 wt %, based on the total weight of the composition
• b) a functional non-ionic hydrophilic polymer in a total concentration of 0-30 wt %, based on the total weight of the composition;
• c) a Norrish I type photoinitiator in a total concentration 1-10 wt %, based on the weight of components a) and b);
• and
• d) at least 68 wt % of a solvent, wherein the components a), b) and c) are dissolved or dispersed;
• curing the primer composition;
• applying a functional coating composition to the surface provided with the primer composition, wherein the functional coating composition comprises;
• e) a functional non-ionic hydrophilic polymer in a total concentration of 0.5-60 wt. %, based on the total weight of the composition,
• f) a polyelectrolyte in a total concentration of 0.1-10 wt %, based on the total weight of the composition,
• g) a photo-initiator in a total concentration of 0.1-10 wt. % based on the total polymer weight,
• h) optionally a water soluble aliphatic compound, a water soluble alicyclic compound or both, in a total concentration of 0.5-25 wt %, based on the total weight of polymers,
• i) optionally an antioxidant in a total concentration of 100-10000 ppmw based on the weight of polymers, and
• j) at least 68 wt % of a solvent, wherein the components b) and e)-h) are dissolved or dispersed;
• and
• curing the functional coating composition.