Method of Drying Bioabsorbable Coating Over Stents
First Claim
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1. A method of coating a stent, comprising:
- applying a composition to a stent substrate, the composition including a polymer component and a solvent;
exposing the polymer component to a temperature equal to or greater than a Tg of the polymer component, wherein the exposing removes solvent from the applied composition; and
repeating the applying and exposing one or more times to form a coating, wherein the solvent content of the coating after the final exposing step is at a level suitable for a finished stent.
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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.
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Citations
22 Claims
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1. A method of coating a stent, comprising:
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applying a composition to a stent substrate, the composition including a polymer component and a solvent; exposing the polymer component to a temperature equal to or greater than a Tg of the polymer component, wherein the exposing removes solvent from the applied composition; and repeating the applying and exposing one or more times to form a coating, wherein the solvent content of the coating after the final exposing step is at a level suitable for a finished stent. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of coating a stent, comprising:
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applying a composition to a stent substrate, the composition including a polymer component and a solvent; thermally treating the applied composition, wherein the thermal treatment removes solvent from the applied composition; and repeating the applying and thermal treatment one or more times to form a coating, wherein a duration of each of the thermal treatments is less than 60 s. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A method of making a stent, comprising:
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depositing a composition onto a stent substrate, the composition including a polymer component and a solvent; blowing a heated gas onto the deposited composition, wherein the heated gas removes solvent from the deposited composition; and repeating the applying and thermal treatment one or more times to form a coating, wherein the coating comprises less than 2 wt % solvent. - View Dependent Claims (20, 21, 22)
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Specification