Coated substrate having a low coefficient of friction hydrophilic coating and a method of making the same
AssigneeBiosearch Medical Products Inc.
InventorsMichael J. Micklus, David T. Ou-Yang
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Abstract
A substrate is coated with a polyvinylpyrrolidone-polyurethane interpolymer. In the method, a polyisocyanate and a polyurethane in a solvent such as methyl ethyl ketone are applied to a substrate and the solvent evaporated. If the substrate is a polyurethane, only the polyisocyanate need be employed. Polyvinylpyrrolidone in a solvent is then applied to the treated substrate and the solvent evaporated. The invention is applied, for example, to a tube such as a catheter, a condom and a peristaltic pump tube.
Claims11
An article having a very low coefficient of friction when wetting with a water base liquid or a lower aliphatic alcohol comprising:
- a substrate to which conventional polyurethanes adhere, and
- a cured polyvinylpyrollidone-polyurethane interpolymer coating on said substrate.
A condom having a base material of polyurethane, and
- a cured coating of a polyvinylpyrollidone-polyurethane interpolymer on the outside of said base material wherein said coated condom has a very low coefficient of friction when wetted with a water base liquid or a lower aliphatic alcohol.
A resilient tube which conventional polyurethanes adhere coated with a cured polyvinylpyrollidonepolyurethane interpolymer to provide the tube with a surface having a very low coefficient of friction when wetted with a water base liquid.
A catheter having a tubular body which conventional polyurethanes adhere, and a cured coating of polyvinylpyrollidone-polyurethane interpolymer on the outside of said body providing the outer surface of said body with a coating having a very low coefficient of friction when wetted with a water base liquid or a lower aliphatic alcohol.
Dependencies are inferred from the claim text.