Method for preparing a composite material, resulting...

C - Chemistry – Metallurgy – 08 – J

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C08J 3/215 (2006.01) A61L 27/44 (2006.01) A61L 27/58 (2006.01) C08K 3/36 (2006.01) C08L 67/04 (2006.01) A61B 17/68 (2006.01)

Patent

CA 2677246

The invention relates to a method for preparing a composite material having a homogeneous composition, containing at least one bioactive ceramic phase and at least one bioresorbable polymer. The inventive method is characterised in that it comprises the following steps: a) a bioactive ceramic phase in powder form is obtained, b) the bioactive ceramic powder is suspended in a solvent, c) a bioresorbable polymer is added to the suspension obtained in (b) and mixed to produce a viscous homogeneous dispersion of said bioactive ceramic powder in a solution formed by the solvent and the polymer, and d) the dispersion obtained in (c) is precipitated in an aqueous solution in order to obtain a homogeneous composite material. The invention also relates to the resulting composite material and to the use thereof in the production of implantable medical devices.

La présente invention porte sur un procédé de préparation d'un matériau composite de composition homogène, comprenant au moins une phase céramique bioactive et au moins un polymère biorésorbable, caractérisé en ce qu'il comprend les étapes suivantes : a°) on dispose d'une phase céramique bioactive sous forme de poudre, b°) on met ladite poudre de céramique bioactive en suspension dans un solvant, c°) on ajoute à la suspension obtenue en b°) un polymère biorésorbable, et on mélange jusqu'à obtention d'une dispersion visqueuse homogène de ladite poudre de céramique bioactive dans une solution composée dudit solvant et dudit polymère, d°) on réalise une précipitation de la dispersion obtenue en c°) dans une solution aqueuse pour obtenir un matériau composite homogène La présente invention porte également sur le matériau composite ainsi obtenu et sur ses applications dans la fabrication de dispositifs médicaux implantables.

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