Medical article having a hydrophilic coating
AssigneeAstra Meditec Aktiebolag
InventorHans R. Lambert
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Abstract
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 0.5 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.
Claims10
A medical article for insertion in the body which is provided with a hydrophilic coating by applying to the article 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 second solution containing between 0.5 to 50 % (weight to volume) of polyethylene oxide having a mean molecular weight of between 10.sup.4 to 10.sup.-7 to the thus treated article and then evaporating the solvent of the second solution, and curing the coating at elevated temperature.
Dependencies are inferred from the claim text.