Process for the preparation of a hydrophilic coating

Details Process for the preparation of a hydrophilic coating Process for the preparation of a hydrophilic coating

A - Human Necessities

61

L

117/183

A61L 29/00 (2006.01) A61L 29/08 (2006.01) B32B 33/00 (2006.01) C08J 7/04 (2006.01)

Patent

CA 1215598

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 con- taining 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 iso- cyanate.

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