Method of drying bioabsorbable coating over stents
AssigneeAbbott Cardiovascular Systems Inc.
InventorsYung-Ming Chen, Jason Van Sciver, Syed F.A. Hossainy, Stephen D. Pacetti
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Abstract
Various embodiments of methods for coating stents are described herein. Applying a composition including polymer component and solvent to a stent substrate followed by exposing the polymer component to a temperature equal to or greater than a Tg of the polymer component is disclosed. Repeating the applying and exposing one or more times to form a coating with the result that the solvent content of the coating after the final exposing step is at a level suitable for a finished stent is further disclosed.
Claims17
1-9. (canceled)
A method of coating a stent, comprising:
- applying a composition to a stent substrate, the composition including a polymer component and a solvent;
- performing a thermal treatment on the applied composition, wherein the thermal treatment removes solvent from the applied composition;
- and
- repeating the applying and the thermal treatment one or more times to form a coating comprising less than 2 wt % solvent,
- wherein a duration of each of the thermal treatments is less than 60 s.
A method of coating a stent, comprising:
- depositing a composition onto a stent substrate, the composition including a polymer component and a solvent, wherein the composition is uniformly deposited to surfaces of the stent substrate;
- blowing a heated gas onto the deposited composition, wherein the heated gas removes solvent from the deposited composition;
- and
- repeating the applying and the blowing one or more times to form a coating comprising less than 2 wt % solvent.
Dependencies are inferred from the claim text.