Patent ID: 8562671

Claim:
Scaffold comprising an electro-spun mesh of a biocompatible block-copolymer, wherein said scaffold has about 90% open pores and a mesh-like structure formed by polymer fibers of about 5 to 10 μm diameter, and wherein said block copolymer has at least two block units obtainable by linear polycondensation in the presence of diisocyanate, diacid halide or phosgene of first block unit selected from the group consisting of a diol (I) and an α,ω-dihydroxy-polyester (IV) with a second block unit selected from the group consisting of the same diol (I), an α,ω-dihydroxy-polyester (II), an α,ω-dihydroxy-polyether (III), and the same α,ω-dihydroxy-polyester (IV), wherein the diol (I) is obtainable by transesterification of poly-[(R)-(3)-hydroxybutyric acid] or copolymers thereof with 3-hydroxyvaleric acid with ethylene glycol, wherein the α,ω-dihydroxy-polyester (II) is obtainable by ring-opening polymerization of cyclic esters selected from the group consisting of (L,L)-dilactide, (D,D)-dilactide, (D,L)-dilactide, diglycolide or mixtures thereof, or lactones selected from the group consisting of β-(R)-butyrolactone, β-(S)-butyrolactone, β-rac-butyrolactone and ε-caprolactone or mixtures thereof, wherein the α,ω-dihydroxy-polyether (III) is selected from the group consisting of α,ω-dihydroxy-poly(oxytetramethylene), α,ω-dihydroxy-poly(oxyethylene) and copolymers of ethylene glycol and propylene glycol, wherein the α,ω-dihydroxy-polyester (IV) is obtainable by trans-esterification of the diol (I) with diglycolide and/or dilactide and/or caprolactone or mixtures thereof.