Hydrophilic coating

Details Hydrophilic coating Hydrophilic coating

1986-03-05

1987-05-19

Lusignan, Michael R.

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

427 2, 4274121, 4274125, 4284237, 4284242, 4284244, 523105, 523113, A61M 5325, A61M 25005, A01N 102

Patent

active

046664378

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 containing 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 isocyanate.

REFERENCES:
patent: 3005728 (1961-10-01), Bridgeford
patent: 3023126 (1962-02-01), Underwood
patent: 3198692 (1965-08-01), Bridgeford
patent: 3216983 (1965-11-01), Shelanski et al.
patent: 3661634 (1972-05-01), Riley et al.
patent: 4100309 (1978-07-01), Micklus et al.
patent: 4119094 (1978-10-01), Michlus et al.
patent: 4128600 (1978-12-01), Skinner et al.
patent: 4373009 (1983-02-01), Winn
"Transport Properties of Polyvinylpyrrolidone-Polyisocyanate Interpolymer Membranes", Desalination, 8, (1970), pp. 177-193, R. L. Riley, C. R. Lyons and U. Merten.
"Hydrogels for Medical and Related Applications", American Chemical Society, Symposium Series 31, 1976, Buddy D. Ratner and Allan S. Hoffman, pp. 1-36.

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