Patent ID: 7553546

Claim:
An implantable medical device, comprising a device body at least partially formed of a polymeric material including a base polymer and a block copolymer, wherein the block copolymer is in the form of ABA, BAB, AB, or a random multi-block copolymer represented generally in the form of ABBAABABA, wherein the block A is PEO and the block B is silicone having at least one polyethylene oxide segment (PEO) and at least one silicone segment, wherein the weight average molecular weight of the block copolymer is in the range of about 400 to about 50,000, and wherein the base polymer material is one of a silicone rubber or a silicone polyurethane copolymer, and wherein covalent bonds are absent between the base polymer and the block copolymer is the form of ABA, BAB, AB, or a multi-block copolymer represented generally in the form of ABBAABABA, wherein the block A is PEO and the block B is silicone.