Polymer films for medical device coating
First Claim
1. A method of preparing a coated biomedical implant comprising:
- providing a biomedical implant;
depositing on said biomedical implant a first layer comprising a hydrophobic polymer;
depositing on said biomedical implant a second layer comprising an impermeable dispersed solid, wherein the impermeable dispersed solid and the hydrophobic polymer are discharged separately through a first and/or second orifice and wherein the impermeable solid is discharged through the first or second orifice as a dry powder and deposited in dry powder form, andsintering the first and second layers under conditions that do not substantially disrupt the activity and/or function of the biomedical implant thereby forming a coating,wherein the coating substantially seals the biomedical implant; and
wherein the coating is substantially impermeable to a gas;
the coating is substantially impermeable to a fluid; and
the coating is substantially impervious to a biological material.
6 Assignments
0 Petitions
Accused Products
Abstract
A method for depositing a coating comprising a polymer and impermeable dispersed solid on a substrate, comprising the following steps: discharging at least one impermeable dispersed solid in dry powder form through a first orifice; discharging at least one polymer in dry powder form through a second orifice; depositing the polymer and/or impermeable dispersed solid particles onto said substrate, wherein an electrical potential is maintained between the substrate and the impermeable dispersed solid and/or polymer particles, thereby forming said coating; and sintering said coating under conditions that do not disrupt the activity and/or function of the substrate. A similar method is provided for depositing a coating comprising a hydrophobic polymer and a water-vapor-trapping material on a substrate.
385 Citations
25 Claims
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1. A method of preparing a coated biomedical implant comprising:
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providing a biomedical implant; depositing on said biomedical implant a first layer comprising a hydrophobic polymer; depositing on said biomedical implant a second layer comprising an impermeable dispersed solid, wherein the impermeable dispersed solid and the hydrophobic polymer are discharged separately through a first and/or second orifice and wherein the impermeable solid is discharged through the first or second orifice as a dry powder and deposited in dry powder form, and sintering the first and second layers under conditions that do not substantially disrupt the activity and/or function of the biomedical implant thereby forming a coating, wherein the coating substantially seals the biomedical implant; and wherein the coating is substantially impermeable to a gas;
the coating is substantially impermeable to a fluid; and
the coating is substantially impervious to a biological material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method for depositing a coating comprising a hydrophobic polymer on a biomedical implant, comprising the following steps:
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forming a coating by a) discharging at least one hydrophobic polymer in dry powder form through a first orifice; b) depositing the hydrophobic polymer onto said biomedical implant, wherein an electrical potential is maintained between the biomedical implant and the polymer particles, thereby forming said coating; c) discharging at least one impermeable dispersed solid in dry powder form through a second orifice; d) depositing the impermeable dispersed solid onto said biomedical implant, wherein an electrical potential is maintained between the biomedical implant and the impermeable dispersed solid particles; and e) sintering said coating under conditions that do not substantially disrupt the activity and/or function of the biomedical implant; wherein the coating substantially seals the biomedical implant. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25)
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Specification