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Polyisobutylene-based polyurethanes

  • US 8,962,785 B2
  • Filed: 11/20/2012
  • Issued: 02/24/2015
  • Est. Priority Date: 01/12/2009
  • Status: Active Grant
First Claim
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1. An implantable lead comprising:

  • an elastomeric polymer, the elastomeric polymer of the implantable lead comprising;

    a hard segment in the amount of 10% to 60% by weight of the elastomeric polymer, wherein the hard segment includes a urethane, urea or urethaneurea; and

    a soft segment in the amount of 40% to 90% by weight of the elastomeric polymer, wherein the soft segment comprises at least about 70% by weight of the soft segment of at least one polyisobutylene macrodiol and/or diamine, and wherein the elastomeric polymer has a tensile strength of at least 18 MPa, an elongation at break of at least 150%, and a tear strength of at least 300 pounds per linear inch.

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