Methods for forming stent coatings comprising hydrophilic additives
First Claim
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1. A method of fabricating a coating for an implantable medical device comprising:
- providing an implantable medical device;
preparing a solution comprising at least one hydrophobic polymer comprising a macromolecular chain, at least one hydrophilic polymer comprising a macromolecular chain, and either a solvent or a blend of solvents;
applying the solution to the implantable medical device; and
removing the solvent or the blend of solvents;
wherein a physically entangled or intertwined system is formed of themacromolecular chains of the hydrophobic polymer and the hydrophilic polymer; and
wherein at least one hydrophobic polymer is selected from the group consisting of polyurethaneureas with a Hildebrand solubility parameter (δ
) of less than 10.7 (cal/cm3)1/2.
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Abstract
A coating for implantable medical devices and a method for fabricating thereof are disclosed. The coating includes a mixture of a hydrophobic polymer and a polymeric hydrophilic additive, wherein the hydrophobic polymer and the hydrophilic additive form a physically entangled or interpenetrating system.
352 Citations
17 Claims
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1. A method of fabricating a coating for an implantable medical device comprising:
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providing an implantable medical device; preparing a solution comprising at least one hydrophobic polymer comprising a macromolecular chain, at least one hydrophilic polymer comprising a macromolecular chain, and either a solvent or a blend of solvents; applying the solution to the implantable medical device; and removing the solvent or the blend of solvents; wherein a physically entangled or intertwined system is formed of the macromolecular chains of the hydrophobic polymer and the hydrophilic polymer; and wherein at least one hydrophobic polymer is selected from the group consisting of polyurethaneureas with a Hildebrand solubility parameter (δ
) of less than 10.7 (cal/cm3)1/2. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of fabricating a coating for an implantable medical device, comprising forming a coating on the device, the coating comprising a mixture of at least one hydrophobic polymer and at least one hydrophilic polymer;
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wherein the macromolecular chains of the hydrophobic polymer and the hydrophilic polymer form a physically entangled or intertwined system; and wherein the hydrophobic polymer comprises poly(meth)acrylates selected from the group consisting of poly(iso-propyl methacrylate), poly(iso-propyl acrylate), and mixtures thereof. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification