Fluorinated copolymers for coating biomedical devices and a...

C - Chemistry – Metallurgy – 08 – F

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C08F 220/22 (2006.01) A61K 9/00 (2006.01) A61L 27/34 (2006.01) A61L 27/54 (2006.01) A61L 29/08 (2006.01) A61L 29/16 (2006.01) A61L 31/10 (2006.01) A61L 31/16 (2006.01) C08F 293/00 (2006.01) C08F 297/02 (2006.01) C08L 53/00 (2006.01) C09D 153/00 (2006.01)

Patent

CA 2365460

Copolymers comprising moieties derived from at least one first fluorinated comonomer having formula (I), wherein X is hydrogen or methyl, Y is a single bond or a radical of the formula CH2NRSO2 or NRSO2, R being a C1-6 alkyl group, Z is hydrogen or fluorine, and n is 0 to 12 and moieties derived from at least one second non-fluorinated comonomer, the glass transition temperature of the homopolymer of said second comonomer being lower than the glass transition temperature of the homopolymer of said first comonomer, are described. A layer of such a copolymer, optionally further comprising a biologically effective amount of at least one biologically active ingredient, is useful for coating a biomedical device such as a catheter or a stent.

La présente invention concerne des copolymères dont des premiers fragments sont dérivés d'au moins un premier comonomère fluoré représenté par la formule générale (I). Dans cette formule, X est hydrogène ou méthyle, Y est une liaison simple ou un radical représenté par la formule CH¿2?NRSO¿2? ou NRSO¿2?, dans laquelle R est un groupe alkyle en C¿1?-C¿6?, Z est hydrogène ou fluor, et n vaut de 0 à 12. D'autres fragments de ces copolymères sont dérivés d'au moins un second copolymère non fluoré. En l'occurrence, la température de transition vitreuse de l'homopolymère du second comonomère est inférieure à la température de tansition vitreuse de l'homopolymère du premier comonomère. Une couche d'un tel copolymère, comprenant en outre éventuellement une quantité biologiquement efficace d'au moins un ingrédient biologiquement actif, convient particulièrement au revêtement d'un dispositif biomédical tel qu'un cathéter ou un stent.

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