Siloxane-containing networks

Details Siloxane-containing networks Siloxane-containing networks

C - Chemistry, Metallurgy

08

F

C08F 283/12 (2006.01) C07C 271/20 (2006.01) C07C 271/24 (2006.01) C07C 271/28 (2006.01) C08F 2/50 (2006.01) C08F 290/02 (2006.01) C08F 290/04 (2006.01) C08G 18/50 (2006.01) C08G 18/61 (2006.01) C08G 18/64 (2006.01) C08G 18/70 (2006.01) C08G 18/80 (2006.01) C08G 18/81 (2006.01) C08G 77/442 (2006.01) G02B 1/04 (2006.01) G03F 7/027 (2006.01) G03F 7/031 (2006.01) G03F 7/033 (2006.01) G03F 7/075 (2006.01)

Patent

CA 2208996

The invention concerns a cross-linked polymer built up from a polymerization product of a highly unsaturated polymer (a) and a polysiloxane (b) with terminal or pendentive hydrosilane groups in such a way that numerous unsaturated carbon-carbon bonds remain intact, at least one vinyl monomer optionally being grafted to these bonds. The invention also concerns methods of producing the cross-linked polymers, as well as moulded products, in particular contact lenses, biomedical articles and artifical corneas consisting completely or substantially of such cross-linked polymers, and the use of the polymers to coat the surfaces of moulded products.

L'invention concerne un polymère réticulé contenant un produit de polymérisation d'un polymère fortement insaturé (a) et d'un polysiloxane (b) comportant des groupes hydrosilanes terminaux ou pendants, de nombreuses liaisons carbone-carbone insaturées restant intactes, sur lesquelles est greffé, le cas échéant, au moins un monomère vinylique. L'invention concerne également un procédé de fabrication de polymères réticulés, ainsi que des corps moulés, notamment des lentilles de contact, des articles biomédicaux ou des cornées artificielles, constitués totalement ou essentiellement de ces polymères réticulés. L'invention concerne en outre l'utilisation de ces polymères réticulés pour former le revêtement de surfaces de corps moulés.

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