Coating process

A - Human Necessities – 61 – L

Patent

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A61L 27/00 (2006.01) A61F 2/16 (2006.01) A61L 27/34 (2006.01) A61L 33/00 (2006.01) A61L 33/08 (2006.01)

Patent

CA 2207740

A process for the coating of an intraocular lens to impart tissue compatibility thereto, comprising the steps: a) priming said lens using a solution of a polyamine; b) coating the lens treated in step a) above with a solution of a periodate-oxidized polysaccharide selected from heparin, heparan sulphate, and chondroitin sulphate to stabilize said polyamine by covalent and/or ionical cross-linking; c) coating the lens treated in step b) above with a solution of a polyamine; and d) coating the lens treated according to step c) above with a solution of a periodate-oxidized polysaccharide selected from heparin, heparan sulphate, and chondroitin sulphate in the presence of a cyanoborohydride to convert formed labile Schiff's bases to stable secondary amines.

La présente invention concerne un procédé de revêtement d'un lentille intra-oculaire permettant de lui conférer une compatibilité tissulaire. Ce procédé comporte plusieurs étapes consistant (a) à préparer la lentille à l'aide d'une solution d'une polyamine, (b) à enduire la lentille traitée à l'étape (a) d'une solution d'un polysaccharide oxydé par un periodate choisi parmi l'héparine, le sulfate d'héparane, et le sulfate de chondroïtine, pour stabiliser la polyamine par une réticulation covalente et/ou ionique, (c) à enduire la lentille traitée à l'étape (b) d'une polyamine en solution, et (d) à enduire la lentille traitée à l'étape (c) d'une solution d'un polysaccharide oxydé par un periodate choisi parmi l'héparine, le sulfate d'héparane, et le sulfate de chondroïtine en présence d'un cyanoborohydrure pour convertir en amines secondaires stables les bases de Schiff labiles qui se sont formées.

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