C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
128/127, 117/160
C08J 7/04 (2006.01) A61L 29/00 (2006.01) A61L 29/08 (2006.01) A61L 29/14 (2006.01) A61L 31/00 (2006.01) B32B 33/00 (2006.01) C08J 7/12 (2006.01)
Patent
CA 1292649
ABSTRACT A method of forming an improved hydrophilic coating by applying a non-reactive hydrophilic polymer surface layer with an osmolality in- creasing compound to produce a more stable hydrophilic surface and to produce a more slippery surface in wet condition. The polymer surface layer is treated with a solution having above 2% (weight-to-volume) of an osmolality increasing compound and then the solvent of the solution is evaporated. Osmolality increasing compounds are nontoxic organic or inorganic salts other than trihalogenids, mono- or di- saccharides or sugar alcohols. Preferred compounds are glucose, sorbitol, sodium chloride, sodium citrate, sodium bensoate, calcium chloride, potassium chloride, potassium iodide, potassium nitrate. The solution of the osmolality increasing compound contains preferably a polymer. Medical articles treated with the solution of osmolality in- creasing compounds according to the method above also relate to the invention.
519255
Johansson Eva Gunilla
Utas-Sjoberg Jan Mikael Roy
Astra Tech Aktiebolag
Fetherstonhaugh & Co.
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