Preparation of a hydrophilic coating

Details Preparation of a hydrophilic coating Preparation of a hydrophilic coating

A - Human Necessities

61

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117/183, 167/335

A61L 29/00 (2006.01) A61L 29/08 (2006.01) B32B 33/00 (2006.01) C08G 18/62 (2006.01) C08J 7/04 (2006.01)

Patent

CA 1215597

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 polyvinylpyrrolidone 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.

425827

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