Biocompatible block copolymer
AssigneesPeter Neuenschwander, Georg K. Uhlschmid, Ulrich W. Suter
InventorsPeter Neuenschwander, Georg K. Uhlschmid, Ulrich W. Suter, Gianluca Ciardelli, Thomas Hirt, Olivier Keiser, Kazushige Kojima, Andreas Lendlein, Sandro Matter
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Abstract
The biocompatible multi-block copolymer is obtainable by linear polycondensation of at least two .alpha.,.omega.-dihydroxypolyesters acid and/or .alpha.,.omega.-dihydroxypolyethers with a diisocyanate, diacid halide or phosgene. The block copolymer is preferably degradable in the human or animal body. The block copolymer is suitable for the production of medical implants and surgical aids.
Claims24
A biocompatible multi-block copolymer, comprising at least two chemically different block units, (1) a first block obtained by transesterification of poly-(R)-3-hydroxybutyric acid or copolymers thereof with 3-hydroxyvaleric acid, with ethylene glycol, and
- (2) a second block comprising an .alpha.,.omega.-dihydroxypolyester which is different from said first block or an .alpha., .omega.-dihydroxypolyether,
- wherein said multi-block copolymer is obtained by linear polycondensation of said first block and said second block with a diisocyanate, diacid halide or phosgene.
Dependencies are inferred from the claim text.