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A process for coating a polymer surface with a hydrophilic coating with low friction in wet condition. The process comprises applying to the polymer surface a solution containing between 0.05 to 40% of a compound which comprises at least two unreacted isocyanate groups per molecule, evaporating the

A process for coating a polymer surface with a hydrophilic coating with low friction in wet condition. The process comprises applying to the polymer surface a solution containing between 0.05 to 40% of a compound which comprises at least two unreacted isocyanate groups per molecule, evaporating the solvent, applying a solution containing between 0.05 to 50% of polyethylene oxide to the thus treated polymer surface and then evaporating the solvent of the last mentioned solution, and curing the coating at elevated temperature. The process is preferably carried out in the presence of a catalyst for the curing of isocyanate.

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A process for placing on a polymer surface a hydrophilic coating which has a low coefficient of friction when wetted with a water based liquid which comprises: applying to the polymer surface a solution containing between 0.05 to 40% (weight to volume) of a compound which comprises at least two unre

A process for placing on a polymer surface a hydrophilic coating which has a low coefficient of friction when wetted with a water based liquid which comprises: applying to the polymer surface a solution containing between 0.05 to 40% (weight to volume) of a compound which comprises at least two unreacted isocyanate groups per molecule, evaporating the solvent, applying a solution containing between 0.5 to 50% (weight to volume) of polyethylene oxide having a mean molecular weight of between 104 to 10-7 to the thus treated polymer surface and then evaporating the solvent of the second solution, and curing the coating at elevated temperature.