Polymeric materials with improved dielectric breakdown strength

• US 6,879,861 B2
• Filed: 12/21/2000
• Issued: 04/12/2005
• Est. Priority Date: 12/21/2000
• Status: Active Grant

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Pratt, Angela, Tapsak, Mark A., Sparer, Randall V., Benz, Michael E.
• Primary Examiner(s): DAHBOUR, HENRY
• Application Number:
  US09/745,619
• Publication Number:
  US 20020082673A1
• Time in Patent Office: 1,573 Days
• Field of Search: 607/116, 607/115, 607/1, 607/122, 607/123, 607/124, 607/125, 607/126, 607/127, 607/128, 607/9, 607/36, 607/5, 607/4, 607/2, 607/119, 607/129, 607/142, 607/152, 607/120, 607/121, 524/471, 524/477, 524/583, 524/585, 524/485, 428/379, 428/383, 428/461, 428/457, 174/107, 174/110.PM, 174/120.SR, 174/106.D, 361/273, 604/151
• US Class Current: 607/116
• CPC Class Codes: C08K 5/5419 containing at least one Si—C bond
• CPC Class Codes: H01B 3/441 from alkenes

Abstract

A novel polymeric electrically insulating material that includes a linked voltage stabilizing agent. Also provided are methods of making the novel material and articles and devices that incorporate the novel material, particularly implantable medical devices.

Claims

1. An electrically insulating material comprising a polymeric component and at least one linked voltage stabilizing agent, wherein the voltage stabilizing agent is covalently linked to or within the polymeric component.

2. The electrically insulating material of claim 1 wherein the voltage stabilizing agent is covalently incorporated into the backbone of the polymeric component.

3. The electrically insulating material of claim 1 wherein the voltage stabilizing agent is covalently attached pendant to the backbone of the polymeric component.

4. The electrically insulating material of claim 1 further comprising a spacer between the polymeric and the voltage stabilizing agent.

5. The electrically insulating material of claim 1 wherein the polymeric component comprises a polymer selected from the group consisting of a silicone, a polyurethane, a polyolefin, a polyacetal, a polycarbonate, a polyvinyl, a polyamide, a polyimide, a polyacrylic, a polystyrene, a polysulfone, a polyetherketone, a cellulosic, a polyester, a polyether, a fluoropolymer, and copolymers thereof.

6. The electrically insulating material of claim 5 wherein the polymeric component comprises at least one copolymer selected from the group consisting of an olefin-vinyl copolymer, an olefin-allyl copolymer, a polyether copolymer, and a polyamide copolymer.

7. The electrically insulating material of claim 6 wherein the polymeric component comprises a polyether-bis-amide copolymer.

8. The electrically insulating material of claim 5 wherein the polymeric component comprises at least one polymer selected from the group consisting of silicone, a polyurethane, a polyimide and a polyamide.

9. The electrically insulating material of claim 1 wherein the voltage stabilizing agent comprises an electron acceptor group, an electron donor group, and a double bond or a conjugated ring system.

10. The electrically insulating material of claim 1 which is a solid, a gel, a gum, or a fluid.

11. A method for making an electrically insulating material comprising covalently attaching at least one voltage stabilizing agent pendant to a polymeric backbone to yield a polymeric electrically insulating material.

12. An article comprising an electrically insulating material comprising a polymeric component and at least one linked voltage stabilizing agent, wherein the voltage stabilizing agent is covalently linked to or within the polymeric component.

13. The article of claim 12 wherein the electrically insulating material is an integral part of the article.

14. The article of claim 12 wherein the electrically insulating material is a coating.

15. The article of claim 12 wherein the electrically insulating material is a solid, a gel, a gum or a fluid.

16. The article of claim 12 wherein the polymeric component comprises a polymer selected from the group consisting of a silicone, a polyurethane, a polyolefin, a polyacetal, a polycarbonate, a polyvinyl, a polyamide, a polyimide, a polyacrylic, a polystyrene, a polysulfone, a polyetherketone, a cellulosic, a polyester, a polyether, a fluoropolymer, and copolymers thereof.

17. An implantable medical device comprising an electrically insulating material having at least one voltage stabilizing agent and wherein the implanted medical device is selected from the group consisting of an implantable cardioverter/defibrillator (ICD), an implantable medical lead, an implantable pulse generator (IPG), a pacemaker-cardioverter-defibrillator (PCD), an neurostimulator, and nerve stimulator, a muscle stimulator, an implantable monitoring device, an implantable fluid handling device, a defibrillator, an implantable gastric stimulator, an implantable drug pump, and an implantable hemodynamic monitoring device.

18. An implantable medical device comprising an electrically insulating material having comprising a polymeric component and at least one voltage stabilizing agent, wherein the voltage stabilizing agent is covalently linked to or within the polymenc components.

19. The implantable medical device of claim 18 selected from the group consisting of an implantable cardioverter/defibrillator (ICD), an implantable medical lead, an implantable pulse generator (IPG), a pacemaker-cardioverter-defibrillator (PCD), an neurostimulator, and nerve stimulator, a muscle stimulator, an implantable monitoring device, an implantable fluid handling device, a defibrillator, an implantable gastric stimulator, an implantable drug pump, and an implantable hemodynamic monitoring device.

20. A device comprising an electrically insulating material comprising a polymeric component and at least one linked voltage stabilizing agent, wherein the device is selected from the group consisting of a transformer, a capacitor, a high voltage cable, and a lead, and wherein the voltage stabilizing agent is covalently linked to or within the polymeric component.

21. A high voltage cable comprising an electrically insulating material comprising a polymeric component and at least one linked voltage stabilizing agent, wherein the voltage stabilizing agent is covalently linked to or within the polymeric component.

22. A polymer blend comprising a first polymer comprising at least one linked voltage stabilizing agent and a second polymer, wherein the first polymer comprises a polymer selected from the group consisting of a silicone, a polyurethane, a polyolefin, a polyacetal, a polycarbonate, a polyvinyl, a polyamide, a polyimide, a polyacrylic, a polystyrene, a polysulfone, a polyetherketone, a cellulosic, a polyester, a polyether, a fluoropolymer, and copolymers thereof, wherein the polymer blend forms an interpenetrating polymer network.

23. The polymer blend of claim 22 in which the first and second polymers are not crosslinked.