Patent ID: 9051411
Filing Date: 2015-06-09
Classification: A61B,B82Y,C08G,C08J,C08L

Abstract:
1. A crosslinked thermoset shape memory polyurethane polymer medical device comprising: a crosslinked thermoset polyurethane polymer comprising a covalently bonded network structure and a reaction product of an aliphatic diisocyanate monomer reacted with at least one symmetric hydroxyl containing monomer; wherein said polymer has shape memory behavior and is formed into a permanent primary shape, re-formed into a stable secondary shape, and is configured to be controllably actuated to recover said permanent primary shape; wherein the diisocyanate monomer and the at least one symmetric hydroxyl containing monomer are formulated to a 1:1 ratio of isocyanate to hydroxyl functional groups; wherein the at least one symmetric hydroxyl containing monomer includes at least one of N,N,N′,N′-tetrakis (2-hydroxypropyl) ethylenediamine (HPED) and triethanol amine (TEA); wherein the polymer has a Young's modulus in a range of 1 to 100 MPa at a temperature above a glass transition temperature of the polymer.