Patent ID: 7208550
Filing Date: 2007-04-24
Classification: C08G,C08J,C08L

Abstract:
1. A shape memory polymeric material comprising a blend of a crystalline polymer selected from the group consisting of poly(vinylidene fluoride), polyglycolides, polylactide and copolymers thereof, poly(hydroxybutyrate), poly(ethylene glycol), polyethylene, polyethylene-co-vinyl acetate, poly(vinyl chloride), poly(vinylidene chloride) and copolymers of poly(vinylidene chloride) and poly(vinyl chloride) with an amorphous polymer selected from the group consisting of poly(vinyl acetate), poly(methyl acrylate), poly(ethyl acrylate), and atactic poly(methyl methacrylate); wherein the shape memory polymeric material has wherein the shape memory polymeric material has rubber modulus and elasticity derived substantially from physical crosslinks formed by annealing the blend at a temperature greater than T