Biodegradable compositions comprising poly(cycloaliphatic...

A - Human Necessities – 61 – L

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A61L 17/00 (2006.01) A61K 47/34 (2006.01) A61L 27/00 (2006.01) A61L 27/18 (2006.01) A61L 31/06 (2006.01) C08G 79/04 (2006.01) C08L 85/02 (2006.01)

Patent

CA 2288014

Biodegradable, flowable or flexible polymer compositions are described comprising a polymer having the recurring monomeric units shown in formula (I), wherein: each of R and R' is independently straight or branched alkylene, either unsubstituted or substituted with one or more non-interfering substituents; L is a divalent cycloaliphatic group; R'' is selected from the group consisting of H, alkyl, alkoxy, aryl, aryloxy, heterocyclic or heterocycloxy; and n is 5 to 1,000, wherein said biodegradable polymer is biocompatible before and upon biodegradation. In one embodiment, one or more of R, R' or R'' is a biologically active substance. Amorphous compositions containing a biologically active substance, in addition to the polymer, and methods for controllably releasing biologically active substances using the compositions, are also described.

L'invention porte sur des compositions de polymères biodégradables, fluides ou malléables, présentant les unités de monomères répétitives de formule I suivante dans laquelle: chacun des R et R' est indépendamment un alkylène droit ou ramifié, substitué ou non, et dont l'un ou plusieurs des substituants n'interfèrent pas; L est un groupe cycloaliphatique divalent; R'' est choisi dans un groupe consistant en H, alkyle, alkoxy, aryle, aryloxy, hétérocyclique ou hétérocycloxy; et n est compris entre 5 et 1000, ledit polymère biodégradable étant biocompatible avant et dès sa biodégradation. Dans l'une des exécutions, un ou plusieurs des R, R' et R'' représentent une substance biologiquement active. L'invention porte également sur des compositions amorphes contenant une substance biologiquement active en plus du polymère, et sur des procédés de libération contrôlée de substances biologiquement actives utilisant lesdites compositions.

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