Patent ID: 8362159
Filing Date: 2013-01-29
Classification: A61L,C08G

Abstract:
1. A biocompatible block copolymer having at least two chemically different block units obtainable by linear polycondensation of (1) a diol with (2) a component selected from the group consisting of the same diol, an α,ω-dihydroxypolyester and an α,ω-dihydroxypolyether, (3) in the presence of an additional compound selected from the group consisting of a diisocyanate, a diacid halide and a phosgene, wherein the diol is obtainable by transesterification of α,ω-dihydroxy-[oligo(3-(R)-hydroxybutyrate)-ethylene-oligo-3-(R)-hydroxybutyrate)] with a compound selected from the group consisting of a diglycolide, a dilactide and mixtures thereof, and wherein the diol has a total content of the diglycolide, dilactide and mixtures thereof of up to 40 mol %, the α,ω-dihydroxypolyester is obtainable by transesterification of poly-(R)-hydroxybutyric acid or copolymers thereof with 3-hydroxyvaleric acid and ethylene glycol, and the α,ω-dihydroxypolyether is selected from the group consisting of α,ω-dihydroxy-poly(oxytetramethylene), α,ω-dihydroxypoly(oxyethylene) and copolymers of ethylene glycol and propylene glycol.