Preparation of hydrophilic coating

Details Preparation of hydrophilic coating Preparation of hydrophilic coating

1984-06-12

1986-04-29

Silverberg, Sam

Coating processes

Medical or dental purpose product; parts; subcombinations;...

Particulate or unit-dosage-article base

4274121, 4274125, 4284237, 4284244, 4284242, 604280, A61M 2500

Patent

active

045856664

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 (1961-10-01), Shelanski
patent: 3661634 (1972-05-01), Riley et al.
patent: 4232608 (1980-11-01), Wrightson
patent: 4373009 (1983-02-01), Winn
R. L. Riley et al., "Transport Properties of Polyvinylpyrrolidone-Polyisocyanate Interpolymer Membranes", Gulf General Atomics Project 6004, pp. 1-30.
Ratner, Buddy D. et al., "Synthetic Hydrogels for Biomedical Applications", Hydrogels for Medical and Related Applications, ASC Symposium Series 31, pp. 1-29, (1976).

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