Flexible lubricious organic coatings
AssigneeC. R. Bard, Inc.
InventorRichard K. Elton
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Abstract
A flexible, lubricious organic polymeric coating is formed by applying a mixture of an isocyanate, a polyol, poly(ethylene oxide), and carrier liquid to a surface to be coated. The carrier liquid is removed and the mixture reacted to form a polyurethane coating with associated poly(ethylene oxide) giving a highly lubricious, abrasion resistant, flexible coating particularly suitable for use as a protective lubricious coating on devices introduced into the body.
Claims7
A method of preparing an abrasion resistant hydrophilic lubricious, organic coating on an organic substrate to be coated,
- said method comprising forming a mixture of an isocyanate, a polyol and a poly(ethylene oxide) in a carrier liquid, removing at least a portion of said carrier liquid, and heating and curing to form a coating substantially of a polyurethane complexed with poly(ethylene oxide) having good adherence to the substrate and good anti-friction properties.
A method of preparing an abrasion resistant, hydrophilic, lubricious organic coating comprising,
- forming a reaction mixture containing an isocyanate, a polyol and a poly(ethylene oxide) having a molecular weight in the range of from 50,000 to 5,000,000,
- said mixture being dissolved in a solvent to form a uniform solution,
- applying said solution to an organic substrate to form a coating,
- removing said solvent,
- and curing said coating to allow said polyol and isocyanate to react to form a cross-linked substantially polyurethane matrix associated with the poly(ethylene oxide).
Dependencies are inferred from the claim text.