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US 10,293,086 B2Granted
Fluoropolymer coatings and related methods
AssigneeMerit Medical Systems, Inc.
InventorsWilliam Paul McKee, Albert Hillen, Pieter van der Wal
Life of this patent
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Abstract
A coating for a medical device or appliance may include a fluoropolymer and a polyimide. Such coatings may provide a lubricious exterior surface that facilitates insertion or displacement of a medical device in a body lumen. Some coatings that include a fluoropolymer and a polyimide may, among other functions and characteristics, provide increased strength and/or durability relative to some other coatings.
Claims18
A coating comprising:
- a first coating layer comprising a polyethersulfone;
- and
- a second coating layer comprising a polymer blend, the polymer blend comprising:
- a fluoropolymer;
- a polyimide;
- and
- a polyethersulfone;
- wherein the polymer blend comprises more fluoropolymer than polyethersulfone by dry weight, and
- wherein the first coating layer differs in composition from the second coating layer, wherein the coating forms an outer surface of a medical appliance, and wherein the medical appliance comprises a hypotube, a guidewire, a mandrel, or a stylet.
6 more elements
A multilayer coating for a medical device, the multilayer coating comprising:
- a first coat comprising a polyethersulfone, wherein the first coat, when dried, comprises greater than 70% polyethersulfone by weight;
- a second coat comprising a polyimide;
- and
- a third coat comprising a fluoropolymer and a polyimide;
- wherein the first coat is an innermost layer and the third coat is an outermost layer of a coating on a medical device, and wherein the first, second, and third coats comprise compositions that differ from one another.
2 more elements
Dependencies are inferred from the claim text.