Hydrophilic interpenetrating polymer network coating for...

A - Human Necessities – 61 – L

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A61L 29/00 (2006.01) A61L 29/04 (2006.01) A61L 29/06 (2006.01) A61L 29/08 (2006.01) C08J 7/04 (2006.01)

Patent

CA 2258077

Method for the manufacture of a medical device which presents a hydrophilic surface coated elongate shaft for insertion into a body passageway comprising the steps of having the elongate shaft formed from a thermoplastic elastomer material selected from the group consisting of a polyether block amide and a styrene block copolymer and forming the hydrophilic coating on the elongate shaft by applying sequentially to the surface of the elongate shaft a solution comprising between 0.05 to 40 9'0 (weight to volume) of an isocyanate compound and a solution containing between 0.5 % and 50 % (weight to volume) of polyvinylpyrrolidone and curing at an elevated temperature.

L'invention concerne un procédé de fabrication d'un dispositif médical comportant une tige allongée à revêtement hydrophile destinée à être insérée dans une voie corporelle. Ce procédé consiste à fabriquer une tige allongée à partir d'une matière élastomère thermoplastique sélectionnée dans le groupe comprenant une amine séquencée polyéther et un copolymère séquencé styrène, et à former le revêtement hydrophile sur la tige allongée en appliquant sur la surface de celle-ci une solution comprenant entre 0,05 et 40 % (poids/volume) d'un composé isocyanate et une solution comprenant entre 0,5 et 50 % (poids/volume) de polyvinylpyrrolidone, puis à durcir ce revêtement à une température élevée.

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