Low particulate lubricious coating with vinyl pyrrolidone and acidic polymer-containing layers
AssigneeSurModics, Inc.
InventorsDavid E. Babcock, Timothy M. Kloke, Joseph S. McGonigle
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Abstract
A lubricious coating for a medical device is formed including first and second coated layers. The first coated layer is between the second coated layer and the device surface and includes a vinyl pyrrolidone polymer and a photo reactive group. The second coated layer is in direct contact with the first coated layer and is a top coating that includes an acrylic acid polymer. The second coated layer can optionally include photoreactive groups. The coating was found to have a very low number of particulates (e.g., 10 μm or greater) which is very desirable for in vivo use.
Claims17
A lubricious coating comprising:
- a first coated layer comprising a vinyl pyrrolidone polymer and photoreactive groups, wherein the photoreactive groups are pendent from the vinyl pyrrolidone polymer or on a first cross-linking agent comprising at least two photoreactive groups, or both;
- and
- a second coated layer that is different in composition than the first coated layer and is a top coating comprising an acid polymer, wherein the second coated layer is in direct contact with the first coated layer, wherein the first coated layer is between the second coated layer and a substrate surface,
- wherein (a) the acid polymer is formed from a composition comprising one or more of the following monomers:
- acrylic acid, methacrylic acid, itaconic acid, monomethyl itaconic acid, maleic anhydride, fumaric acid, crotonic acid, acrylamido-2-methylpropanesulfonic acid (AMPS), 2-(meth)acrylamido-2-methylpropane sulfonic acid, vinyl sulfonic acid, 2-sulfoethyl methacrylate, and salts thereof, or (b) the acid polymer is a sulfonic acid polymer, a carboxylic acid polymer, or a phosphonic acid polymer.
Dependencies are inferred from the claim text.