A polyurethane article with shape memory, comprising a mixture of thermoplastic polyurethane and reactive monomer cross-linker which is formed into a shaped article, irradiated, expanded and applied to a medical device, specifically a biomedical electrical lead....http://www.google.com.au/patents/US6664335?utm_source=gb-gplus-sharePatent US6664335 - Polyurethane elastomer article with "shape memory" and medical devices therefrom
