Process for preparing functionally coated expanded products...

Details Process for preparing functionally coated expanded products... Process for preparing functionally coated expanded products...

A - Human Necessities

61

M

A61M 25/10 (2006.01) A61L 29/08 (2006.01)

Patent

CA 2107271

ABSTRACT OF THE DISCLOSURE A process for preparing expanded thermoplastic medical products (e.g., dilatation balloons) having biomedical functional coatings such as lubricous coatings or protective coatings is disclosed. The process involves the steps of coating a suitable expandable thermoplastic tubing with the biomedical functional coating, at least partially drying the coated tubing, and then stretching and expanding the coated tubing. The coating comprises at least one functional agent (e.g., poly(ethylene oxide), a hydrophilic polyurethane or polysiloxane) dispersed, or emulsified in a carrier such as water and/or an organic solvent. Conventional fabricating procedures are used for stretching and expanding the coated tubing. Optional steps may include a heating step during stretching and expansion. The coated products produced by this process have an uniformly functional coating.

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